The B737 Cockpit Companion by Captain Bill Bulfer is one of the most respected technical resources in the aviation world, serving as a vital bridge between official manufacturer manuals and the practical needs of line pilots. While many users search for a "B737 Cockpit Companion PDF," it is important to understand that the official evolution of this resource has shifted toward a highly interactive iPad application and physical spiral-bound books. What is the B737 Cockpit Companion?
Unlike a standard Flight Crew Operations Manual (FCOM), which often adheres to a strict "need-to-know" philosophy, the Cockpit Companion provides an in-depth "theory of operation" for Boeing 737 systems. Written by Bill Bulfer, a veteran airline captain, it explains not just what a switch does, but how the underlying system functions and how it interacts with other components. Key Features of the Series
The guide is available in different versions tailored to specific 737 generations, including the Classics (-300/400/500), the Next Generation (NG) (-600/700/800/900), and the 737 MAX.
High-Resolution Schematics: Features detailed vector-based drawings of electrical, hydraulic, and pneumatic systems.
Circuit Breaker Locator: Includes an extensive, alphabetized list of circuit breakers with their locations and power sources.
Panel-by-Panel Descriptions: Every light, switch, and indicator in the cockpit is meticulously detailed.
Practical Insights: Notes derived from decades of real-world flying experience that clarify complex system behaviors often glossed over in official training. PDF vs. App vs. Physical Book B737 Cockpit Companion - App Store - Apple
Here’s a short descriptive piece you could use for a product listing, review, or website section for a B737 Cockpit Companion PDF:
Title:
B737 Cockpit Companion PDF – Quick Reference for the Modern 737 Pilot
Description:
Designed for Boeing 737 pilots (NG and MAX), the B737 Cockpit Companion PDF is a streamlined, easy‑to‑navigate digital guide that puts essential cockpit data at your fingertips. Whether you’re in initial type rating, recurrent training, or lining up for departure, this companion helps you reduce head‑down time and fly with greater confidence.
What’s Inside:
Format:
Ideal for:
Note:
This is a pilot‑created performance support tool — not a substitute for the official FCOM, QRH, or company manuals. Always follow approved data.
The B737 Cockpit Companion by Bill Bulfer is considered the definitive "pilot-friendly" guide for mastering the complex systems of the Boeing 737 aircraft series. Whether you are a professional pilot preparing for recurrent training or a dedicated flight simmer, this manual provides depth beyond standard airline training materials.
While many users search for a B737 Cockpit Companion PDF, the official version has transitioned into a highly interactive mobile experience. Why Pilots and Simmers Use the Cockpit Companion
Beyond "Need-to-Know": Standard manuals often simplify systems. The Companion explains the "theory of operation," helping pilots understand why systems behave a certain way.
Comprehensive Systems Data: It covers the Boeing 737 Classics, Next Generation (NG), and MAX variants.
Visual Aid: It features high-resolution, vector-based schematics and panel graphics for precise identification of controls and indicators.
Practical Tools: It includes an extensive index of over 700 items, a circuit breaker locator (with power source and ATA chapter), and detailed system notes. The Evolution of the Digital "PDF"
Although unofficial scanned PDF versions sometimes appear on document-sharing sites like Scribd, these are often outdated and lack the dynamic features of official digital versions. The primary way to access the digital Cockpit Companion today is through the B737 Cockpit Companion App on the App Store, which provides: B737 Cockpit Companion - App Store - Apple b737 cockpit companion pdf
Boeing 737 Cockpit Companion (often abbreviated as CC) is a renowned technical reference guide used by airline pilots, trainees, and flight simulator enthusiasts to master the complex systems of the B737 aircraft. The Legacy of the Cockpit Companion Authored by Bill Bulfer
, a veteran airline pilot, the guide was created to bridge the gap between standard manufacturer manuals and the practical knowledge required in the cockpit. While Boeing provides the Flight Crew Operating Manual (FCOM), the Cockpit Companion is often preferred for its digestible format and "plain English" explanations of how systems actually interact. Key Features and Content
The guide, available in both printed and digital formats (including interactive iPad apps), provides a comprehensive breakdown of every switch, light, and dial in the cockpit. Interactive Systems Study
: Digital versions allow users to click on specific cockpit components to see their function, related wiring, and how they behave during malfunctions. Model Coverage
: It covers various generations of the aircraft, including the Classic (CL) Next Generation (NG) Circuit Breaker (CB) Locations
: A critical feature for pilots is the detailed mapping of circuit breakers, which are often difficult to locate quickly in high-stress situations. Integration with Official Manuals : It acts as a supplement to the Quick Reference Handbook (QRH)
, providing deeper context on "why" a system operates a certain way, rather than just "how" to operate it. Role in Pilot Training
For pilots undergoing a type rating or recurrent training, the "B737 Cockpit Companion PDF" or app is considered an essential study aid. It is particularly valued by Training Captains (TRE/TRI)
for its accuracy and its ability to simplify complex electrical, hydraulic, and pneumatic system logic.
Despite being a paid, third-party resource, it remains a gold standard in the aviation community because it translates dense engineering data into actionable pilot knowledge. (like the NG or MAX) or a detailed summary of a particular system, such as hydraulics or electrics?
The B737 Cockpit Companion (often referred to as the "Bulfer book") is a legendary, highly regarded technical guide for Boeing 737 pilots and enthusiasts, authored by retired airline Captain Bill Bulfer. While historically a paper book, it is now primarily available as a comprehensive iPad/tablet app, and sometimes found as unauthorized PDFs.
Here is a review based on its reputation and current app-based format as of 2026. Overview & Purpose
The Cockpit Companion is not a procedural guide (like an SOP or QRH). Instead, it is a deep-dive systems book designed to teach pilots "how the airplane is built" and "how the systems work," focusing on "theory of operation" rather than just the "need to know" philosophy of modern training. What the B737 Cockpit Companion Covers
Detailed Panel Explanations: Deep analysis of every switch, light, and function on the overhead, glareshield, pedestals, and center panels.
Vector-Based Schematics: High-resolution drawings explaining mechanical and electrical systems, such as bleed air, hydraulics, and fuel.
Circuit Breaker Locator: A comprehensive index listing item, location, power source, and ATA chapter.
System Notes: Insights into system functionality, minimum equipment considerations, and "pilot-friendly" notes, often going beyond the official FCOM.
737 Variations: Covers the 737NG (600-900), Classic (EFIS/EIS), and includes 737 MAX differences.
Unmatched Depth: Often provides details that official company manuals omit, filling the gaps for a deeper understanding of the aircraft.
Visual Learning: Excellent color diagrams and photos make complex systems easy to understand. The B737 Cockpit Companion by Captain Bill Bulfer
Interactive (App Version): The app version allows you to tap a cockpit component on a photo and immediately see the associated system notes, making it faster than searching physical manuals.
Invaluable for Training/Sims: Considered "mandatory" reading for home cockpit builders and excellent prep for type ratings or recurrent training. Weaknesses & Limitations
Not Airline Specific: Because it is a generic guide, it may not match the specific limitations, MEL, or configurations of your operator.
App Cost: The app can be considered expensive, although users generally feel it is worth the price.
Paper Book Rarity: The physical book is no longer manufactured by the author, making it harder to find, with the app being the primary updated source.
Complexity: Contains more information than required for a basic oral exam, which might be overwhelming for new trainees. PDF vs. App B737 Cockpit Companion - Ratings & Reviews - App Store
B737 Cockpit Companion is a highly regarded pilot's technical guide, often found in digital PDF or app formats, designed to simplify the complex systems of the Boeing 737.
Depending on what you are looking for, this query could refer to a few different things: educational content and technical features of the book itself. digital features of the PDF/App version (searchability, updates). Purchasing options for the physical or digital editions. summary of the technical systems covered in the guide, or do you need help finding where to buy the digital version? Key Features of the B737 Cockpit Companion System Overviews: Provides high-level explanations of Primary Flight Controls like elevators, ailerons, and rudders. Circuit Breaker Maps: Detailed locations for various panels, such as the and crew oxygen shutoff valves. Component Locations:
Quick-reference diagrams for locating thousands of parts and miles of wiring within the airframe. Model Coverage: Variants ranging from the "Jurassics" to the latest For more specific pilot data, you can check The Boeing 737 Technical Site for detailed technical logs and system updates. Are you interested in a specific aircraft variant (like the MAX vs. the NG), or are you trying to a copy for your own flight simulation?
The flight bag smelled of warmed vinyl and lemon polish. Jonah flipped through the pages of a battered PDF on his tablet—an unofficial cockpit companion for the Boeing 737 he'd studied for months. The file had been passed along by a retired captain at the flight club, stitched together from checklists, anecdotes, and hand-drawn diagrams. To Jonah it felt like a talisman.
He had landed into this week-night cross-country as a newly minted first officer, green enough that fluorescent lights in the ops room still made his stomach flutter. Tonight’s pairing was a calm captain named Reyes, whose uniform creases said patience and whose voice said safe. Jonah offered the tablet before taxi; Reyes waved him off with a small smile.
"Keep it. Best stories are the ones you read in motion," Reyes said.
Jonah thumbed the PDF open again as engines warmed. The first section was plain checklist—cold and necessary. Below it, a typed note read: "Know the airplane, know yourself." Jonah liked that line; it read like permission to belong.
On climb out, as they threaded through cotton-clouds and the city lights winked below, Jonah found a page titled "Unwritten Procedures." It wasn't procedural at all but a string of short vignettes: a copilot who saved a flight by noticing a mis-set altimeter; a captain who hummed the same lullaby into his headset to settle nervous passengers; an instructor who insisted every pilot learn to troubleshoot a stuck trim by feel.
Jonah imagined the people behind the notes—hands that had mapped a problem by touch across a metal yoke, voices that had learned cadence in stormy nights. The stories felt like a lineage, a quiet chain of small choices that kept an airplane airworthy.
Over the next hours the PDF became a companion. During cruise, Jonah scrolled to an appendix of cockpit etiquette: "Callouts are crew medicine. Poor calls, poor outcomes." He practiced crisp radio-readbacks under his breath, savoring how language could steady the work.
Halfway to their destination, the weather ahead closed in. ATC rerouted them around cells of thunderstorms, and Reyes's calm shifted from ease to intent. A minor anomaly cropped up—an interior light flickering in the galley—but it was the little things that reveal character. Jonah remembered a different page in the PDF: "When boredom bites, attention wanes. Treat every light as a potential symptom." He signaled, checked, and confirmed with Reyes. The light was traced to a loose panel and logged. The gesture was small; it threaded him into practice.
Descending through scattered showers, a cabin call came: a passenger with severe airsickness in 26A. Jonah felt the old rookie impulse to fumble and over-apologize. Instead he reached to the PDF's human section—short paragraphs on passenger care, not regulations. "Offer water. Speak calmly. Reassure what you can," it said. He relayed a few measured phrases to the flight attendant, who thanked him with tired relief. The passenger quieted. Jonah felt a quiet pride that had nothing to do with procedure and everything to do with being useful.
On final approach, a crosswind gust bent the airplane like a reed. The runway lights shimmered through rain. Jonah's hands found the yoke by muscle memory he'd practiced in sims and by lines he’d read late at night. Reyes's corrections were sparse but exact. When they touched down with a gentle, controlled firmness, Jonah felt the PDF's words settle inside him like ballast.
Later, at the gate, the captain closed the throttle and faced Jonah. "How was your companion?" he asked. Title: B737 Cockpit Companion PDF – Quick Reference
Jonah tapped the tablet, then the pages, then Reyes's eyes. "Terrible book for getting nervous," he said, and Reyes's laugh loosened the long journey.
"Good," Reyes said. "A proper cockpit companion should make you think, not soothe you. It should make you better."
Jonah uploaded a note into the flight log—dry, official lines about performance and maintenance. Then, before shutting down his tablet, he opened a blank page and typed a short paragraph into the PDF: a small scene about a first officer who learned to steady his calls during a storm, who offered water to a sick passenger, and who learned that a file could be more than ink and pixels—it could be an inheritance.
He signed it with his initials and a date, leaving room for the next pair of hands to find the note, to add a correction, an anecdote, or a sketch of a knob. The cockpit companion was never finished; it simply gathered people who cared enough to write.
As he walked away from the jet into cool tarmac air, Jonah realized the most valuable pages were the ones not found in any official manual: the ones that taught how to be human while operating something that demanded precision. The PDF had started as a tool. By the time he reached the terminal lights, it felt like a small, living lineage—one pilot passing on steadiness to the next, one note at a time.
Modern 737 cockpits increasingly rely on Electronic Flight Bags (EFBs)—tablets running approved software (e.g., Boeing’s Toolbox, Lido, or airline-custom apps). These EFBs include dynamic checklists, performance calculators, and real-time data. They have largely replaced static PDF companions, though some pilots still create personal “kneeboard cards” for high-workload scenarios. The desire for a simple, offline PDF persists among student pilots, flight sim enthusiasts, and those training for type ratings.
A cockpit companion typically condenses hundreds of pages of the Flight Crew Operations Manual (FCOM), Quick Reference Handbook (QRH), and systems schematics into a pocket-sized or tablet-based format. Common contents include:
For example, a 737NG pilot might use a companion to verify the maximum landing weight or recall the correct action for a pack trip off, without flipping through the full QRH during a critical phase of flight.
In terms of lifestyle and entertainment, airlines operating the Boeing 737 often focus on providing a comfortable and enjoyable experience for their passengers. This can include:
In-flight Entertainment (IFE): Many airlines offer IFE systems on their 737 aircraft, featuring a variety of movies, TV shows, music, and games. The selection can vary significantly between airlines, reflecting different cultural tastes and audience preferences.
Cabin Interior and Comfort: The 737's cabin interior is designed to be comfortable and efficient. Airlines may customize their 737s with different seating configurations, lighting schemes, and decorative elements to enhance the passenger experience.
Catering and Beverages: The range of food and beverages offered on a 737 flight can greatly depend on the airline and the flight duration. Some airlines provide full meals, while others may offer snacks and drinks for purchase.
Connectivity and Power: With the increasing demand for staying connected, some 737 aircraft are equipped with USB charging ports, power outlets, and even wireless connectivity options, allowing passengers to stay entertained or productive during their flight.
A good companion will include annotated diagrams of the three main panels:
The term “B737 Cockpit Companion” typically refers to a specific set of cockpit reference guides, most notably the "Cockpit Companion" series by Pat Boone (Aviation-Jobs.com) or similar condensed system summary cards. These resources are designed to bridge the gap between dense airline flight manuals (FCOM) and the immediate memory requirements of a pilot in the cockpit.
In the context of the "PDF" modifier, the search term represents a demand for a digital, searchable, and portable version of these physical reference cards. While highly valued by student pilots and type-rating candidates for simplifying complex Boeing 737 systems, the distribution of these PDFs exists in a legal grey area regarding copyright and poses potential safety risks if used as a primary reference instead of official airline documentation.
Title: Why You Need a B737 Cockpit Companion PDF in Your Flight Bag
Intro:
Studying the Boeing 737 cockpit can feel overwhelming — dozens of switches, multiple panel layouts, and critical memory items to recall under pressure. That’s where a well-organized B737 Cockpit Companion PDF comes in.
What makes a great companion guide?
Pro tip for sim pilots: Use the companion PDF during cold & dark starts to build muscle memory without alt-tabbing out of the sim.
Final thought: A good cockpit companion won’t teach you systems in depth, but it will save you time hunting for switches — and that’s pure efficiency up front.