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EASA Regulations for Boeing 777

78 airworthiness directives and regulations affecting Boeing 777.

EASA AD US-2023-08-05

Fuselage - Pivot Bulkhead Forward Outer Chord - Repetitive Inspections

Airworthiness Directive 2023-08-05 is a final rule issued by the Federal Aviation Administration addressing certain Boeing Company Model 777 airplanes. It mandates repetitive detailed and high frequency eddy current inspections of the pivot bulkhead forward outer chord at station 2370 and longeron fitting to detect cracking. The directive aims to prevent potential failure of the pivot bulkhead outer chord that could lead to loss of horizontal stabilizer control and airplane controllability.

Airworthiness Directive

Boeing 777

EASA AD 2021-0234R1

Information Systems — Electronic Flight Bag Universal Serial Bus Receptacle — Modification

EASA Airworthiness Directive 2021-0234R1 is a regulatory update addressing the modification of Electronic Flight Bag (EFB) Universal Serial Bus (USB) receptacles installed on various aircraft including Fokker F27 and F28 models, Airbus A318 through A340 series, ATR42 and ATR72, Boeing 737 through 777 models, Bombardier CL-600 series, and De Havilland Canada DHC-8 aircraft. The directive mandates modifications to affected USB receptacles to prevent overheating and potential smoke or fumes in the cockpit. This AD applies to specific manufacturer serial numbers as detailed in the directive's appendix.

Airworthiness Directive

Airbus A318
Airbus A319
Airbus A320
Airbus A321
Airbus A330
Airbus A340
ATR ATR42
ATR ATR72
Boeing 737
Boeing 757
Boeing 767
Boeing 777
Bombardier CL-600 (Challenger)
De Havilland Canada DHC-8
Fokker CRR-0146
Fokker CRR-0185
Fokker CRR-0186
Fokker CRR-0190
Fokker CRR-0206
Fokker CRR-0210
Fokker CRR-0241
Fokker CRR-0265
Fokker CRR-0290
Fokker CRR-0300
Fokker CRR-0309
MHI RJ Aviation CL-600 (Regional Jet)
Fokker F27
Fokker F28
Boeing 747
Bombardier CL-600

EASA AD US-2023-03-04

Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment

The Federal Aviation Administration's Airworthiness Directive 2023-03-04 is a final rule addressing all Boeing Model 777 airplanes. It mandates modifications and inspections related to the fuel system, including installation of Teflon sleeves, cap sealing of fasteners, and revisions to maintenance programs to incorporate more restrictive airworthiness limitations. This directive aims to mitigate the risk of fuel tank explosions caused by arcing in the main and center fuel tanks.

Airworthiness Directive

Boeing 777

EASA AD 2023-0040

Engine — Intermediate Pressure Compressor Rotor Shaft — Inspection

EASA Airworthiness Directive 2023-0040 is an airworthiness directive addressing Rolls-Royce RB211 Trent 800 series engines, specifically models 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895-17, commonly installed on Boeing 777 aircraft. The directive mandates inspections of the intermediate pressure compressor rotor shaft to detect cracking in the balance land area. It aims to ensure continued safe operation by requiring repetitive visual borescope inspections and corrective actions as necessary.

Airworthiness Directive

Rolls-Royce Deutschland Ltd & Co Kg RB211 TRENT 800
Boeing 777

EASA AD US-2022-23-10

Water / Waste - Potable Water System - Deactivation / Modification

Airworthiness Directive 2022-23-10 is a final rule issued by the Federal Aviation Administration affecting all Boeing 777F series airplanes. It addresses unsafe conditions related to the potable water system, specifically water supply line detachment above an electronic equipment cooling filter that can cause water intrusion into the forward electronic equipment bay. This directive requires deactivating the potable water system, installing protective shrouds on water supply and return lines, and performing leak tests to prevent water damage to critical electrical systems.

Airworthiness Directive

Boeing 777
Boeing 777F

EASA AD US-2022-23-11

Fuel - Center Wing Tank Fuel Quantity Indicating System - Installation / Check

The Federal Aviation Administration's Airworthiness Directive 2022-23-11 addresses certain Boeing Company Model 777 airplanes. It targets discrepancies between the center wing tank fuel quantity indicated by the fuel quantity indicating system and the actual fuel uploaded, which can lead to misleading engine and crew alerts. The directive mandates software updates or replacements for the fuel quantity processor unit to ensure accurate fuel quantity readings.

Airworthiness Directive

Boeing 777

EASA AD 2022-0225

Engine Fuel & Control — Fuel Pump — Replacement

EASA Airworthiness Directive 2022-0225 is an airworthiness directive addressing Rolls-Royce Deutschland RB211 Trent 800 series engines installed on Boeing 777 aircraft. It mandates replacement of certain Eaton Corporation fuel pumps identified as affected parts due to corrosion and debris issues that can cause engine thrust loss. The directive ensures continued airworthiness by requiring removal and replacement of these fuel pumps to prevent engine in-flight shutdowns.

Airworthiness Directive

Rolls-Royce Deutschland Ltd & Co Kg RB211 TRENT 800
Boeing 777

EASA AD US-2022-18-11

Superseded by FAA AD 2023-17-14

FAA Airworthiness Directive 2022-18-11 is a final rule affecting all Boeing Company Model 777 airplanes, including the 777-200, -200LR, -300, -300ER, and 777F variants. It addresses the discovery of cracks in the front spar lower chord during underwing longeron replacements and mandates repetitive inspections and modifications to critical structural components at station 1035. The directive aims to prevent fuel leaks, fire hazards, and potential structural failures.

Airworthiness Directive

Boeing 777

EASA AD US-2022-14-05

[Correction] Flight Controls - Elevators, Rudder, and Rudder Tab - Inspections and Lubrication

The Correction to Airworthiness Directive 2022-14-05 issued by the Federal Aviation Administration (FAA) addresses inspection and lubrication requirements for flight controls including elevators, rudder, and rudder tab on all Boeing 777-200, -200LR, -300, -300ER series airplanes, and certain 777F models. This correction fixes an incorrect freeplay indicator value and adds omitted credit for certain service information related to these inspections and maintenance procedures.

Airworthiness Directive

Boeing 777200200LR300300ER
Boeing 777F

EASA SIB SAFO22002

Electronic Flight Bags - Onboard Performance Tool v4.70 for iOS Devices

The Safety Alert for Operators SAFO 22002 addresses issues with Boeing's Onboard Performance Tool (OPT) version 4.70 for iOS devices, used on Boeing airplanes. The document highlights two calculation errors affecting takeoff and landing performance data, which could lead to incorrect runway length information being presented to flight crews. These issues specifically impact the accuracy of landing calculations and intersection takeoff calculations within the OPT software.

Safety Information Bulletin

Boeing 737
Boeing 747
Boeing 757
Boeing 767
Boeing 777
Boeing 787

EASA AD US-2022-15-06

Superseded by FAA AD 2025-21-02

FAA Airworthiness Directive 2022-15-06 is a final rule applicable to all Boeing Model 777 airplanes. It addresses an unsafe condition caused by high electrical resistance due to corrosion in gust suppression sensor transorb modules. This condition can expose flight control electronics to damaging lightning voltages, potentially leading to loss of airplane control.

Airworthiness Directive

Boeing 777

EASA AD US-2022-11-05

Wings - Rear Spar Outboard Flap Support Fasteners and Shims - Inspection / Replacement

The Federal Aviation Administration's Airworthiness Directive 2022-11-05 is a final rule addressing certain Boeing Model 777 airplanes. It mandates inspections and replacements related to the rear spar outboard flap support fasteners and shims to prevent loss of fastener retention and potential flap separation. This directive aims to maintain the structural integrity and controllability of affected aircraft.

Airworthiness Directive

Boeing 777

EASA SIB AIR-22-09R1

Autopilot Flight Director System: ALT HOLD Engaged on Takeoff

The Special Airworthiness Information Bulletin AIR-22-09R1 is an FAA advisory addressing the potential for the Autopilot Flight Director System (AFDS) altitude hold (ALT) mode to engage erroneously during takeoff on Boeing Model 777-200, -200LR, -300, -300ER, 777F, and Model 787-8, -9, and -10 airplanes. This bulletin informs operators of a known issue where ALT hold mode activation on the ground can lead to improper pitch guidance after liftoff, potentially causing low climb rates or descent warnings. The bulletin provides background, operational details, and references Boeing Multi Operator Messages for corrective procedures.

Safety Information Bulletin

Boeing 777
Boeing 787

EASA AD US-2022-06-07

Fuselage - Forward Outer Chords of the Pivot Bulkhead - Inspection

Airworthiness Directive 2022-06-07 is a final rule issued by the Federal Aviation Administration (FAA) addressing certain Boeing 777-200 and 777-300 series airplanes. It mandates inspections of the forward outer chords of the STA 2370 pivot bulkhead to detect fatigue cracking, including repetitive detailed and high frequency eddy current (HFEC) inspections of the longeron fitting and bulkhead assembly structure. This directive aims to prevent potential failure of the forward outer chord that could lead to loss of horizontal stabilizer control.

Airworthiness Directive

Boeing 777200300

EASA AD US-2022-07-13

Engine Oil - Air/Oil Heat Exchanger - Inspection / Replacement

The Federal Aviation Administration's Airworthiness Directive 2022-07-13 addresses Pratt & Whitney Division turbofan engines models PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3. This directive mandates inspection and possible replacement of the air/oil heat exchanger due to corrosion-related leaks that have caused in-flight shutdowns, particularly affecting Boeing 777 aircraft powered by these engines.

Airworthiness Directive

Pratt & Whitney PW4070
Pratt & Whitney PW4080
Pratt & Whitney PW4090
Boeing 777

EASA AD US-2022-06-10

Exhaust - Thrust Reverser Inner Wall Debris Shields - Installation // Powerplant - Fan Cowl Doors / Hydraulic Pump Shutoff Valves - Inspection / Functional Check

Federal Aviation Administration Airworthiness Directive 2022-06-10 is a final rule addressing certain Boeing 777-200 and 777-300 series airplanes equipped with Pratt & Whitney engines. It mandates the installation of debris shields on the thrust reverser inner wall, inspection of fan cowl doors for moisture ingress, and repetitive functional checks of hydraulic pump shutoff valves to prevent unsafe conditions related to in-flight fan blade failures. This directive aims to mitigate risks of engine shutdown, uncontrolled fires, and structural damage.

Airworthiness Directive

Boeing 777200300

EASA AD US-2022-06-11

Nacelles / Pylons - Engine Inlet - Modification

Federal Aviation Administration Airworthiness Directive 2022-06-11 is a final rule addressing certain Boeing 777-200 and 777-300 series airplanes equipped with specific Pratt & Whitney engines. It mandates modifications to the engine inlet to withstand loads from potential in-flight fan blade failures, which have been reported in three incidents. This directive aims to mitigate risks of engine shutdown, inlet separation, uncontrolled fires, and consequent loss of airplane control.

Airworthiness Directive

Boeing 777200300

EASA AD US-2022-04-09

Superseded by FAA AD 2023-13-11

FAA Airworthiness Directive 2022-04-09 is a final rule addressing certain AVOX System Inc. (formerly Scott Aviation) oxygen cylinder and valve assemblies installed on various transport airplanes, including Boeing 737 Next Generation and 777 series models. The directive targets assemblies with oxygen leakage caused by improper spacing between valve components, which could lead to insufficient oxygen supply or ignition risks during depressurization events.

Airworthiness Directive

Boeing 737 Next Generation
Boeing 777

EASA AD US-2021-24-12

Fuel / Inert Gas System - Airworthiness Limitations / Critical Design Configuration Control Limitations - Revision

The Fuel / Inert Gas System - Airworthiness Limitations / Critical Design Configuration Control Limitations - Revision is a final rule airworthiness directive issued by the FAA for certain Boeing Company Model 777 airplanes. It addresses updated and more restrictive airworthiness limitations and critical design configuration control limitations related to fuel tank ignition prevention, the engine fuel suction feed system, and the nitrogen generation system. This directive aims to mitigate risks of fuel tank explosions and engine flameouts.

Airworthiness Directive

Boeing 777

EASA AD US-2022-03-05

Superseded by FAA AD 2023-12-05

FAA Airworthiness Directive 2022-03-05 is a final rule addressing all Boeing Model 747-8F, 747-8 series, and 777 airplanes. It mandates revisions to the airplane flight manual to prohibit dispatch and landing operations at airports affected by 5G C-Band interference, which can disrupt radio altimeter functions critical to flight control systems. This directive aims to mitigate risks from erroneous radio altimeter data caused by interference from wireless broadband operations in the 3.7-3.98 GHz frequency band.

Airworthiness Directive

Boeing 7478F8
Boeing 777