AD 2005-18-51

final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 777 Airplanes

AD Number
2005-18-51
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. FAA-2005-22252
FR Citation
70 FR 53547

Applicability

TypeManufacturerModelDetails
aircraft Boeing 777 Airworthiness Directives; Boeing Model 777 Airplanes

Unsafe Condition

The operational program software (OPS) of the air data inertial reference unit (ADIRU) using data from faulted (failed) sensors, which could result in anomalies of the fly-by-wire primary flight control, autopilot, auto-throttle, pilot display, and auto-brake systems.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Install a specific operational program software (OPS) in the ADIRU as specified in Boeing Alert Service Bulletin 777-34A0137. Revise the Airplane Flight Manual to include operating instructions from Boeing 777 Operations Manual Bulletins CS3-3093 and CS3-3155 to inform the flightcrew of possible heading errors and potential drift angle discrepancies.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Boeing Model 777 airplanes, all serial numbers, with ADIRU software versions after P/N 3470-HNC-100-03, including P/N 3477-HNC-100-04 and later versions.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Boeing 777

Related Airworthiness Directives

2011-26-03

final rule

Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series Airplanes

Unsafe Condition: unsafe condition on these products.

Effective: Jan 3, 2012 Category: aircraft

2011-09-15

final rule

Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series Airplanes

Unsafe Condition: could result in a fuel tank explosion and consequent loss of the airplane.

Effective: Jun 6, 2011 Category: aircraft

2011-09-11 Recurring

final rule

Airworthiness Directives; The Boeing Company Model 777-200 and -300 Series Airplanes Equipped With Pratt and Whitney Engines

Unsafe Condition: We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires repetitive inspections for hydraulic fluid contamination of the interior of the strut disconnect a...

Effective: Jun 6, 2011 Category: engine

View all Boeing ADs →