AC 29-2B

Historical

Advisory circular · Certification of Transport Category Rotorcraft

A newer version is currentThis is a historical version. AC 29-2C CHG 9 is the version in force, approved June 23, 2023.
Approved
July 30, 1997
Last reviewed
January 23, 2001
Cancels
AC29-2A
Cancelled by
AC29-2C
Family
AC 29-2 · 13 versions
Revision
B
14 CFR parts
29

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 22, 2025.

Show pages 1–9
Page 10OCROpen in PDF

SECTION 20. PERSONNEL AND CARGO ACCOMMODATIONS (continued) Page No.

338. FAR 29.803 Emergency Evacuation ..501 338A. FAR 29.803 Emergency Evacuation ..502

339. FAR 29.805 Flightcrew Emergency Exits ..503 339A. FAR 29.805 Flightcrew Emergency Exits ..503

340. FAR 29.807 Passenger Emergency Exits 504 340A. FAR 29.805 Emergency Exits... 505

341. FAR 29.809 Emergency Exit Arrangement .506 341A. FAR 29.809 Emergency Exit Arrangement. .507

342. FAR 29.811 Emergency Exit Marking ..508 342A. FAR 29.811 Emergency Exit Marking. 510

343. FAR 29.812 Emergency Lighting 511

344. FAR 29.813 Emergency Exit Access 511

345. FAR 29.815 Main Aisle Width513

346. FAR 29.831 Ventilation.. 514

347. FAR 29.833 Heaters.. 515

348.-356. RESERVED SECTION 21. FIRE PROTECTION

357. FAR 29.851 Fire Extinguishers.. 526

358. FAR 29.853 Compartment Interiors 526 FAR 29.855 Cargo and Baggage Compartments.. 529 FAR 29.855 Cargo and Baggage Compartments 531 FAR 29.859 Combustion Heater Fire Protection 531 FAR 29.861 Fire Protection of Structure, Controls, and 535 Other Parts 361A. FAR 29.861 Fire Protection of Structure, Controls, and .538 Other Parts

362. FAR 29.863 Flammable Fluid Fire Protection 538

363.-372. RESERVED SECTION 22. EXTERNAL LOAD ATTACHING MEANS

373. FAR 29.865 External Load Attaching Means. .551 373A. FAR 29.865 External Load Attaching Means .556

374.-383. RESERVED

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SECTION 23. MISCELLANEOUS (DESIGN AND CONSTRUCTION) Page No.

384. FAR 29.871 Leveling Marks . 576

385. FAR 29.873 Ballast Provisions 576

386. FAR 29.877 Ice Protection ..577

387.-396. RESERVED SECTION 24. POWERPLANT - GENERAL

397. FAR 29.901 Installation ..608 397A. FAR 29.901 Installation 615 397B. FAR 29.901 Installation ..615

398. FAR 29.903 Engines 616 398A. FAR 29.903 Engines ...618 398B. FAR 29.903 Engines .620 398C. FAR 29.903 Turbine Engine Installation ..620

399. FAR 29.907 Engine Vibration .620

400. FAR 29.908 Cooling Fans. .621 400A. FAR 29.908 Cooling Fans. ..622

401.-420. RESERVED SECTION 25. ROTOR DRIVE SYSTEM

421. FAR 29.917 Design ..645 421A. FAR 29.917 Design .646

422. FAR 29.921 Rotor Brake ..649

423. FAR 29.923 Rotor Drive System and Control Mechanism 651 Tests 423A. FAR 29.923 Rotor Drive System and Control Mechanism .657 Tests 423B. FAR 29.923 Rotor Drive System and Control Mechanism .664 Tests 423C. FAR 29.923 Rotor Drive System and Control Mechanism ..664 Tests

424. FAR 29.927 Additional Tests.. .666 424A. FAR 29.927 Additional Tests... 668

425. FAR 29.931 Shafting Critical Speeds 671

426. FAR 29.935 Shafting Joints........ ...676

427. FAR 29.939 Turbine Engine Operating Characteristics .676

428.-445. RESERVED

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SECTION 26. FUEL SYSTEM Page No.

446. FAR 29.951 General... ..697

447. FAR 29.952 Fuel System Crash Resistance ..699

448. FAR 29.953 Fuel System Independence ..725

449. FAR 29.954 Fuel System Lightning Protection ...726

450. FAR 29.955 Fuel Flow... .727 450A. FAR 29.955 Fuel Flow... .731

451. FAR 29.957 Flow Between Interconnected Tanks ...735

452. FAR 29.959 Unusable Fuel Supply 735

453. FAR 29.961 Fuel System Hot Weather Operation.. ..736 453A. FAR 29.961 Fuel System Hot Weather Operation ..738

454. FAR 29.963 Fuel Tanks: General 739 454A. FAR 29.963 Fuel Tanks: General .739 454B. FAR 29.963 Fuel Tanks: General .740

455. FAR 29.965 Fuel Tank Tests..... .741

456. FAR 29.967 Fuel Tank Installation .743 456A. FAR 29.967 Fuel Tank Installation .745

457. FAR 29.969 Fuel Tank Expansion Space .746 457A. FAR 29.969 Fuel Tank Expansion Space .746

458. FAR 29.971 Fuel Tank Sump .... .746 458A. FAR 29.971 Fuel Tank Sump .... .748

459. FAR 29.973 Fuel Tank Filler Connection .749 459A. FAR 29.973 Fuel Tank Filler Connection .749

460. FAR 29.975 Fuel Tank Vents and Carburetor Vapor Vents 751 460A. FAR 29.975 Fuel Tank Vents and Carburetor Vapor Vents .751 460B. FAR 29.975 Fuel Tank Vents and Carburetor Vapor Vents ..752

461. FAR 29.977 Fuel Tank Outlet753

462. FAR 29.979 Pressure Refueling and Fueling Provisions Below Fuel Level .753

463.-482. RESERVED SECTION 27. FUEL SYSTEM COMPONENTS

483. FAR 29.991 Fuel Pumps . ..775 483A. FAR 29.991 Fuel Pumps .. .776

484. FAR 29.993 Fuel System Lines and Fittings ..776

485. FAR 29.995 Fuel Valves.. 777

486. FAR 29.997 Fuel Strainer or Filter.. ..777 486A. FAR 29.997 Fuel Strainer or Filter .778

487. FAR 29.999 Fuel System Drains .. ...779 487A. FAR 29.999 Fuel System Drains. .779

488. FAR 29.1001 Fuel Jettisoning ... ..780

489.-497. RESERVED XIl

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SECTION 28. OIL SYSTEM Page No.

498. FAR 29.1011 General .791

499. FAR 29.1013 Oil Tanks .. 792

500. FAR 29.1015 Oil Tank Tests . ..792

501. FAR 29.1017 Oil Lines and Fittings ..793

502. FAR 29.1019 Oil Strainer or Filter. 793 502A. FAR 29.1019 Oil Strainer or Filter 794

503. FAR 29.1021 Oil System Drains... .795

504. FAR 29.1023 Oil Radiators.. 795

505. FAR 29.1025 Oil Valves. 795

506. FAR 29.1027 Transmission and Gearboxes - General.. .796

507.-515. RESERVED SECTION 29. COOLING

516. FAR 29.1041 General ..807

517. FAR 29.1043 Cooling Tests.. ..810 517A. FAR 29.1043 Cooling Tests.. ..812

518. FAR 29.1045 Cooling Test Procedures 813

519. FAR 29.1047 Takeoff Cooling Test Procedures ..817

520. FAR 29.1049 Hovering Cooling Test Procedures. 819 521-530. RESERVED SECTION 30. INDUCTION SYSTEM

531. FAR 29.1091 Air Induction 831

532. FAR 29.1093 Induction System Icing Protection. 832 532A. FAR 29.1093 Induction System Icing Protection .841

533. FAR 29.1101 Carburetor Air Preheater Design.. .842

534. FAR 29.1103 Induction System Ducts and Air Duct Systems. ..842

535. FAR 29.1105 Induction System Screens .845

536. FAR 29.1107 Intercoolers and After-Coolers ..845

537. FAR 29.1109 Carburetor Air Cooling. .845

538.-547. RESERVED SECTION 31. EXHAUST SYSTEM

548. FAR 29.1121 General.. .856

549. FAR 29.1123 Exhaust Piping... .857

550. FAR 29.1125 Exhaust Heat Exchangers .859

551.-56 0. RESERVED XIII

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SECTION 32. POWERPLANT CONTROLS AND ACCESSORIES Page No.

561. FAR 29.1141 Powerplant Controls: General. ..873

562. FAR 29.1142 Auxiliary Power Unit Controls 874

563. FAR 29.1143 Engine Controls... 875 563A. FAR 29.1143 Engine Controls... 876 563B. FAR 29.1143 Engine Controls... 876

564. FAR 29.1145 Ignition Switches.. ...876

565. FAR 29.1147 Mixture Controls .. ..877

566. FAR 29.1151 Rotor Brake Controls. ..878

567. FAR 29.1157 Carburetor Air Temperature Controls 879

568. FAR 29.1159 Supercharger Controls ..879

569. FAR 29.1163 Powerplant Accessories 880

570. FAR 29.1165 Engine Ignition Systems 881

571.-583. RESERVED SECTION 33. POWERPLANT FIRE PROTECTION

584. FAR 29.1181 Designated Fire Zones: Regions Included .895

585. FAR 29.1183 Lines, Fittings, and Components. 896

586. FAR 29.1185 Flammable Fluids 897

587. FAR 29.1187 Drainage and Ventilation of Fire Zones 898

588. FAR 29.1189 Shutoff Means ..899

589. FAR 29.1191 Firewalls. ..900

590. FAR 29.1193 Cowling and Engine Compartment Covering 904 590A. FAR 29.1193 Cowling and Engine Compartment Covering .905

591. FAR 29.1194 Other Surfaces ..... .906

592. FAR 29.1195 Fire Extinguishing Systems ..907

593. FAR 29.1197 Fire Extinguishing Agents ..910

594. FAR 29.1199 Extinguishing Agent Containers .913

595. FAR 29.1201 Fire Extinguishing System Materials.. 914

596. FAR 29.1203 Fire Detector Systems .914

597.-616. RESERVED SECTION 34. EQUIPMENT - GENERAL

617. FAR 29.1301 Function and Installation ..939

618. FAR 29.1303 Flight and Navigation Instruments. 939

619. FAR 29.1305 Powerplant Instruments.. ..943 619A. FAR 29.1305 Powerplant Instruments. 944 619B. FAR 29.1305 Powerplant Instruments .945 XIV

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SECTION 34. EQUIPMENT - GENERAL (continued) Page No.

619C. FAR 29.1305 Powerplant Instruments. 946

620. FAR 29.1307 Miscellaneous Equipment 946

621. FAR 29.1309 Equipment, Systems, and Installations 947

622.-631. RESERVED SECTION 35. INSTRUMENTS - INSTALLATION

632. FAR 29.1321 Arrangement and Visibility ..977

633. FAR 29.1322 Warning, Caution, and Advisory Lights. 978

634. FAR 29.1323 Airspeed Indicating System 981 634A. FAR 29.1323 Airspeed Indicating System 982

635. FAR 29.1325 Static Pressure Systems 982

636. FAR 29.1327 Magnetic Direction Indicator .983

637. FAR 29.1329 Automatic Pilot Systems .984

638. FAR 29.1331 Instruments Using A Power Supply .993

639. FAR 29.1333 Instrument Systems .994

640. FAR 29.1335 Flight Director Systems .994

641. FAR 29.1337 Powerplant Instruments .996 Paragraph (b) - Fuel Gauge Calibration 641A. FAR 29.1337 Powerplant Instruments .997

642.-651. RESERVED SECTION 36. ELECTRICAL SYSTEMS AND EQUIPMENT

652. FAR 29.1351 Electrical Systems and Equipment - General 1009

653. FAR 29.1353 Electrical Equipment and Installations 1014

654. FAR 29.1355 Distribution System . 1016 654A. FAR 29.1355 Distribution System. .1016

655. FAR 29.1357 Circuit Protective Devices ..1017 655A. FAR 29.1357 Circuit Protective Devices 1018 656 FAR 29.1359 Electrical System Fire and Smoke Protection 1019

657. FAR 29.1363 Electrical Systems Tests . 1020

658.-667. RESERVED SECTION 37. LIGHTS

668. FAR 29.1381 Instrument Lights... 1032

669. FAR 29.1383 Landing Lights1032

670. FAR 29.1385 Position Light System Installation. .. 1033

671. FAR 29.1387 Position Light System Dihedral Angles.. 1033 XV

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SECTION 37. LIGHTS (continued) Page No.

672. FAR 29.1389 Position Light Distribution and Intensities 1033

673. FAR 29.1391 Minimum Intensities in the Horizontal 1033 Plane of Forward and Rear Position Lights

674. FAR 29.1393 Minimum in Any Vertical Plane of Forward 1033 and Rear Position Lights

675. FAR 29.1395 Maximum Intensities In Overlapping Beams 1033 of Forward and Rear Position Lights

676. FAR 29.1397 Color Specifications 1033

677. FAR 29.1399 Riding Light.... .. 1033

678. FAR 29.1401 Anticollision Light System 1035

679.-688. RESERVED SECTION 38. SAFETY EQUIPMENT

689. FAR 29.1411 General.. 1044

690. FAR 29.1413 Safety Belts: Passenger Warning Device. . 1046

691. FAR 29.1415 Ditching Equipment 1047

692. RESERVED

693. FAR 29.1419 Ice Protection 1050

694.-701. RESERVED SECTION 39. MISCELLANEOUS EQUIPMENT

702. FAR 29.1431 Electronic Equipment 1076

703. FAR 29.1433 Vacuum Systems.. .. 1076

704. FAR 29.1435 Hydraulic Systems. . 1077

705. FAR 29.1439 Protective Breathing Equipment. .. 1080

706. FAR 29.1457 Cockpit Voice Recorder. 1081

707. FAR 29.1459 Flight Recorders ... . 1083

708. FAR 29.1461 Equipment Containing High Energy Rotors 1085

709.-717. RESERVED SECTION 40. OPERATING LIMITATIONS

718. FAR 29.1501 General... . 1096

719. FAR 29.1503 Airspeed Limitations: General .. 1096

720. FAR 29.1505 Never-Exceed Speed . 1098

721. FAR 29.1509 Rotor Speed... 1101

722. FAR 29.1517 Limiting Height-Speed Envelope. 1103

723. FAR 29.1519 Weight and Center of Gravity .. .1104

724. FAR 29.1521 Powerplant Limitations 1104 XVI

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SECTION 40. OPERATING LIMITATIONS (continued) Page No.

724A. FAR 29.1521 Powerplant Limitations 1105 724B. FAR 29.1521 Powerplant Limitations 1106

725. FAR 29.1522 Auxiliary Power Unit Limitations. 1107

726. FAR 29.1523 Minimum Flightcrew.. 1107

727. FAR 29.1525 Kinds of Operations.. 1111

728. FAR 29.1527 Maximum Operating Altitude 1112

729. FAR 29.1529 Instructions for Continued Airworthiness 1112 (Maintenance Manual) 729A. FAR 29.1529 Instructions for Continued Airworthiness 1115 (Maintenance Manual)

730.-739. RESERVED SECTION 41. MARKINGS AND PLACARDS

740. FAR 29.1541 General (See Paragraph 781). 1126

741. FAR 29.1543 Instrument Markings: General (See Paragraph 781) 1126

742. FAR 29.1545 Airspeed Indicator (See Paragraph 781).. 1126

743. FAR 29.1547 Magnetic Direction Indicator 1126

744. FAR 29.1549 Powerplant Instruments (See Paragraph 781) . 1126

745. FAR 29.1551 Oil Quantity Indicator 1126

746. FAR 29.1553 Fuel Quantity Indicator 1127

747. FAR 29.1555 Control Markings1127

748. FAR 29.1557 Miscellaneous Markings and Placards 1129

749. FAR 29.1559 Limitations Placard... 1130

750. FAR 29.1561 Safety Equipment1131

751. FAR 29.1565 Tail Rotor. 1132

752.-761. RESERVED SECTION 42. ROTORCRAFT FLIGHT MANUAL

762. FAR 29.1581 General.. 1143

763. FAR 29.1583 Operating Limitations. 1151 763A FAR 29.1583 Operating Limitations. . 1154

764. FAR 29.1585 Operating Procedures. . 1154

765. FAR 29.1587 Performance Information 1156 765A. FAR 29.1587 Performance Information.. .. 1160

766. FAR 29.1589 Loading Information. .1160

767.-774. RESERVED XVII

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CHAPTER 3 - MISCELLANEOUS AIRWORTHINESS STANDARDS Page No.

775. IFR Certification.. 1171

776. Certification Procedure for Rotorcraft Avionic Equipment.. 1192 Standardized Test Procedure for Rotorcraft DC 1209 Electrical System Tests

118. Standardized Test Procedure for Rotorcraft Generator Cooling 1214

779. FARS 29.1301, 29.1309, and 29.1322 Annunciator Panels 1217

780. RESERVED

781. FARs 29.1541, 29.1543, and 29.1549 Instrument Markings 1220 781A. FAR 29.1549 Powerplant Markings 1224

782. Rotorcraft and Systems Certification for Category II 1224 Operations

783. Structural Condition Indicators... 1230

784. Full Authority Digital Electronic Controls (FADEC) for 1234 Installations with Category A Engine Isolation

785. Agricultural Dispensing Equipment Installation .1236

786. Emergency Medical Service (EMS) Systems, Installations, 1242 Interior Arrangements, and Equipment

787. RESERVED

788. Substantiation of Composite Rotorcraft Structure . 1262 Appendix 1 Fatigue Evaluation of Transport Category Rotorcraft A1-1 Structure (Including Flaw Tolerance) Appendix 2 Rotorcraft OEI Power Assurance A2-1 Appendix 3 Advisory Material for Compliance with Rotorburst Rule. A3-1 XVIII

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ILLUSTRATIONS The first digits in the figure or table number are the same as the related paragraph number.

The digits after the hyphen are the number within the paragraph. Most figures or tables are located at the end of the related paragraph.

Figure/ Table No. Title Page 55-1 H-V Requirements 75 55-2 IGE Controllability Requirements 76 55-3 Shaft Horsepower vs. Turbine Outlet 77 Temperature - Sea Level Standard Day 55-4 Uninstalled Takeoff Power Available 78 55-5 Installed Takeoff Power Available, Anti-Ice, 79 400 RPM 55-6 Power Assurance Check Chart 80 58-1 Takeoff Performance Category A 87 58A-1 Takeoff Performance Category A 89 60-1 Category A Vertical Takeoff Profile Ground 99 Heliport 60-2 Category A Vertical Profile Pinnacle 100 60A-1 Category A Vertical Takeoff Profile Ground 110 Level Heliport 60A-2 Category A Vertical Takeoff Profile Elevated 111 Heliport 64-1 Conventional Takeoff Profile Category B 117 68-1 Autorotational Characteristics - Typical 128 70-1 Category A Conventional Landing - Clear 139 Heliport XIX

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Figure/Table No. Title Page 70-2 Category A Vertical Landing 140 70A-1 Category A Conventional Landing - Clear 150 Heliport 70A-2 Category A Vertical Landing 151 72-1 Height-Velocity Diagram 160 72-2 Altitude/Weight Accountability 161 85-1 Static Longitudinal Stability 183 110-1 Demonstration Points 214 137-1 Load Factor Gross Weight Curve 241 140-1 Sample Yaw/Forward Speed Diagram 246 140-2 Sample Yaw/Forward Speed Diagram 248 162-1 (View Looking Forward) 275 162-2 (View Looking Forward) 276 230-1 Comparison Percent of Time in Level Flight 348 249-1 Example of Casting Load Sheet Retract 381 Actuator Support-Landing Gear 249-1 (Table 1) Castings to be Static Tested for Model XYZ 383 328-1 Cockpit Visibility 476 337-1 Sea State Code - World Meteorological 501 Organization 373-1 Summary of Part 133 Rotorcraft Load 558 Combinations Certifiable Under § 29.865 386-1 Continuous Icing-Temperature vs. Altitude 592 Limits XX

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Figure/Table No. Title Page 386-2 Intermittent Icing-Temperature vs. Altitude 593 Limits 386-3 Mean Effective Drop Diameter-Microns 594 386-4 Intermittent Icing-Liquid Water Content vs. 595 Drop Diameter 386-5 Supercooled Clouds 596 423A-1 Rotor Drive System Endurance 660 423A-2 Takeoff Run Portion of Rotor Drive System 661 Endurance Test If 2 ½ Minute OEI Rating is Requested.

423A-3 Takeoff Run Portion of Rotor Drive System 662 Endurance Test If 30 Second/2 Minute OEI Rating is Requested.

425-1 Cantilevered Shaft, First Critical Speed 675 425-2 Shaft Between Support Bearings, First Critical 675 Speed 447-1 Static Tension and Shear Loading Modes 719 447-2 Hose Assembly Tests 720 447-3 Minimum Average and Individual Loads for 721 Hose and Hose-End Fitting Combinations 447-4 Typical Method of Breakaway Fuel Fitting Load 722 Calculations 447-5 Typical Methods of Frangible or Deformable 723 Attachment Load Calculations 447-6 Typical Methods of Frangible or Deformable 724 Attachment Load Calculations XXI