Airworthiness directives › 2022-15-07
AD 2022-15-07 Airworthiness Directives; The Boeing Company Airplanes
Models named: 747-400 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 747-400 series airplanes, certificated in any category, having a three air data computer (ADC) configuration, except for airplanes on which the Production Revision Record (PRR) 85655 has been incorporated.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 90 days after the effective date of this AD, revise the Non-Normal Procedures Section of the existing AFM to include the changes specified in paragraphs (g)(1) through (4) of this AD. Revising the existing AFM to include the changes specified in paragraphs (g)(1) through (4) of this AD, may be done by inserting a copy of figure 1 to paragraph (g)(1) through figure 4 to paragraph (g)(4) of this AD into the existing AFM. (1) In Section 2, Non-Normal Procedures, add the “HEAT P/S CAPT” paragraph to include the information in figure 1 to paragraph (g)(1) of this AD. BILLING CODE 4910-13-P ER11AU22.006 (2) In Section 2, Non-Normal Procedures, add the “HEAT P/S F/O” paragraph to include the information in figure 2 to paragraph (g)(2) of this AD. ER11AU22.007 (3) In Section 2, Non-Normal Procedures, add the “HEAT P/S L AUX” paragraph to include the information in figure 3 to paragraph (g)(3) of this AD. ER11AU22.008 (4) In Section 2, Non-Normal Procedures, add the “HEAT P/S R AUX” paragraph to include the information in figure 4 to paragraph (g)(4) of this AD. ER11AU22.009
Unsafe condition
This AD was prompted by a report that after a certain circuit breaker tripped, power to the two pitot-static (P/S) probe heaters on the right-hand side was lost, and the flightcrew discovered conflicting procedures in the flightcrew operations manual/quick reference handbook (FCOM/QRH). The FAA is issuing this AD to address the conflicting procedures, which could result in the transmission of potentially inaccurate pitot static pressure data to the ADC, resulting in erroneous or misleading air data being displayed, which, in combination with a stall, overspeed, overrun, or short/hard landing condition, could result in reduced ability of the flightcrew to maintain continued safe flight and landing of the airplane.
Affected ADs
None.
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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