Airworthiness directives › 2011-25-11
AD 2011-25-11 Airworthiness Directives; The Boeing Company Airplanes
Applicability*9
This AD applies to all The Boeing Company 757-200, 757-200PF, 757-200CB, 757-300, 767-200, 767-300, and 767-300F series airplanes; certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done. Restatement of Requirements of AD 2008-09-07, Amendment 39-15488 (73 FR 21811, April 23, 2008), With No Changes
Required actions
Except as provided by paragraphs (h) and (i) of this AD: Within 30 days after May 8, 2008 (the effective date of AD 2008-09-07, Amendment 39-15488 (73 FR 21811, April 23, 2008)), revise the Limitations section of the applicable AFM to include the following. This may be done by inserting a copy of this AD into the AFM. “If the STATUS cue shows while on the ground after engine start or during flight, select the status page on the secondary EICAS display, and verify the “L ENG FUEL FILT” message is not shown. If the “L ENG FUEL FILT” message is not shown on the status page, the secondary engine parameters may be reselected on the secondary EICAS display, or the display may be blanked. If the “L ENG FUEL FILT” message is shown on the status display, accomplish the ENGINE FUEL FILTER non-normal checklist as published in the Boeing Quick Reference Handbook. If on the ground, check the Dispatch Deviations Guide (DDG), or operator equivalent. In the event that the status level “L ENG FUEL FILT” and advisory level “R ENG FUEL FILT” messages are simultaneously shown, an impending fuel filter bypass condition exists on both engines. With both messages shown, airplane fuel system contamination may be present and may result in erratic engine operation or flameout. Further flight crew action in response to either or both the “L ENG FUEL FILT” status-level message and the “R ENG FUEL FILT” advisory level messages being shown are not established by Boeing or the FAA. Any further flight crew action should be determined by individual operator policy. Boeing policy on flight crew use of status-level messages has not changed. After engine start, any condition having an adverse effect on safe continuation of the flight appears as an EICAS alert message (Warning, Caution, or Advisory). If other status-level messages are shown as a consequence of complying with these temporary operating instructions, the flight crew should respond in accordance with the appropriate operator policy. Dispatch of the airplane with an inoperative EICAS display unit is prohibited.”
Unsafe condition
This AD was prompted by an error in the operating program software (OPS) of the engine indication and crew alerting system (EICAS). The error prevents the display of an advisory message to the flightcrew of a left engine fuel filter contamination and imminent bypass condition, which may indicate an imminent multiple engine thrust loss or engine malfunction event due to fuel contamination. We are issuing this AD to prevent malfunction and thrust loss on both engines, which could result in a forced off-airport landing.
Affected ADs
This AD supersedes AD 2008-09-07, Amendment 39-15488 (73 FR 21811, April 23, 2008).
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