Airworthiness directives › 2019-19-10
AD 2019-19-10 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737-300, -400, -500, -600, -700, -700C, -800, -900, -900ER series, 757-200. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company airplanes, certificated in any category, identified in paragraphs (c)(1) through (5) of this AD. (1) Model 737-300, -400, -500, -600, -700, -700C, -800, -900, and -900ER series airplanes. (2) Model 757-200, -200PF, -200CB, and -300 series airplanes. (3) Model 767-200, -300, -300F, and -400ER series airplanes. (4) Model 777-200, -200LR, -300, -300ER, and -777F series airplanes. (5) Model 787-8 and 787-9 airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes identified in paragraph (c)(1) of this AD: Within 120 days after the effective date of this AD, do the actions specified in paragraphs (g)(1) and (2) of this AD. (1) Revise the “Extended Range Operations” subsection of the “Fuel System Limitations” section of the Section 1 Certificate Limitations of the existing airplane flight manual (AFM) by incorporating the information specified in figure 1 to paragraph (g)(1) of this AD. This may be done by inserting a copy of this AD into the existing AFM. When a statement identical to that in figure 1 to paragraph (g)(1) of this AD has been included in the “Extended Range Operations” subsection of the “Fuel System Limitations” section of the Section 1 Certificate Limitations of the general revisions of the existing AFM, the general revisions may be inserted into the existing AFM, and the copy of this AD may be removed from the existing AFM. ER12DE19.000 (2) Revise the “Extended Range Operations” section of the Section 3 Normal Procedures of the existing AFM by incorporating the information specified in figure 2 to paragraph (g)(2) of this AD. This may be done by inserting a copy of this AD into the existing AFM. When a statement identical to that in figure 2 to paragraph (g)(2) of this AD has been included in the “Extended Range Operations” section of Section 3 Normal Procedures of the existing AFM, the general revisions may be inserted into the existing AFM, and the copy of this AD may be removed from the existing AFM. ER12DE19.001
Unsafe condition
This AD was prompted by reports of fuel crossfeed valves failing to open when activated during flight. The FAA is issuing this AD to prevent an airplane from being dispatched on an extended operations (ETOPS) flight with a single fuel crossfeed valve (due to design or due to minimum equipment list (MEL) dispatch of a dual crossfeed valve equipped airplane with one crossfeed valve inoperative) that cannot be opened or a fuel balancing system that cannot properly operate when activated. This condition could cause the fuel in the main tank associated with a failed engine to be unavailable to the remaining operative engine, potentially resulting in a forced off airport landing due to exhaustion of the remaining usable fuel and consequent loss of all engine thrust.
Affected ADs
This AD affects AD 88-21-03 R1, Amendment 39-6077 (53 FR 46605, November 18, 1988) (“AD 88-21-03 R1”).
Read the original on the Federal Register →
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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