Airworthiness directives › 2023-05-04
AD 2023-05-04 Airworthiness Directives; The Boeing Company Airplanes
Models named: 787-8, 787-9, 787-10. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company Model 787-8, 787-9, and 787-10 airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes with an original airworthiness certificate or original export certificate of airworthiness issued on or before the effective date of this AD: Within 60 months after the effective date of this AD, inspect the RAT pump and control module (PCM) and the RAT assembly to determine the part number. A review of airplane maintenance records is acceptable in lieu of this inspection if the RAT PCM and the RAT assembly part numbers can be conclusively determined from that review.
Unsafe condition
This AD was prompted by reports of ram air turbine (RAT) assembly failures, which caused the RAT to fail to provide hydraulic power. The failures were determined to be caused by variations in the bronze metal used during manufacturing, which can result in varying fatigue properties. The FAA is issuing this AD to address fatigue or cracking of the RAT hydraulic pump bronze cylinder block. This condition, if not addressed, could cause failure of the RAT pump and subsequent loss of backup hydraulic power for the flight controls, which can result in loss of continued safe flight and landing.
Affected ADs
None.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
- Bring your existing list in from a spreadsheet Paste the rows straight out of Excel. Headers like C/W Date and N/A are read for you.
- A copy that works when this does not One file. No internet, no login, no this software running. For the morning something has to be produced and the computer is not cooperating.
- $5 a month, or $50 a year Up to 50 aircraft on either.
Look round a real shop first Start free
The demonstration shop is eleven real aircraft with a year of work behind them. No account needed.
The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1