Airworthiness Directive · Amendment 39-22238 · Fuel
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes, certificated in any category, Group 1 and Group 2 as identified in Boeing Alert Requirements Bulletin 777-28A0090 RB, dated March 30, 2021.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This AD was prompted by reports of discrepancies between the center wing tank (CWT) fuel quantity, as indicated by the fuel quantity indicating system (FQIS), and the refueling truck uploaded fuel amount, followed by certain engine-indicating and crew-alerting system (EICAS) messages. This AD requires installing new software in the fuel quantity processor unit (FQPU), or replacing the FQPU with one that includes new software, depending on airplane configuration; doing a software version check; and doing a FQPU operational check, depending on airplane configuration. This AD also prohibits the installation of certain FQPUs on certain airplanes. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 777-28A0090 RB, dated March 30, 2021, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 777-28A0090 RB, dated March 30, 2021.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 777-28A0090, dated March 30, 2021, which is referred to in Boeing Alert Requirements Bulletin 777-28A0090 RB, dated March 30, 2021.
Where the Compliance Time column of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 777-28A0090 RB, dated March 30, 2021, uses the phrase “the original issue date of Requirements Bulletin 777-28A0090 RB,” this AD requires using “the effective date of this AD.”
Accomplishing the actions required by this AD on all affected airplanes in an operator's fleet terminates the requirements of AD 2020-11-11 for that fleet.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
