[491O-13-Pj

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14CFR Part 39 LjCi

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1\(11: nDocket No. FAA-2010-++++j Directorate Identifier 20] O-NM-207-ADj Amendmen vi' U~ \\0 39-**; AI) 201o-,1Z,;j ..

RIN 2120-AA64

Airworthiness Directives; The Boeing Company Model 757 and 767 Airplanes

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AGENCY: Federal Aviation Administration (FAA), DOT.

ACTiON: Final rule; request for comments.

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SUMMARY: We are adopting a new airworthiness directive (AD) for the products liste i")ler Ii 0

above. This AD requires repetitive testing for correct functioning of the engine indicatio _I tJt)

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and crew alerting system (EICAS) to ensure that it receives both the LOW FUEL and ft,:,1'7):,>1.1'~t..

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FUEL CONFIG discrete signals from the fuel quantity processor unit (FQPU), and alerts i(,;'>~'" I.~

the flightcrew of a low fuel situation, and if the test fails, troubleshooting to find wire

faults and damaged equipment, and corrective actions if necessary. This AD was

prompted by a report that the EICAS failed to alert the flightcrew of an improper fuel

system configuration during flight. Later in that flight the EICAS failed to alert the

flightcrew that the fuel in the lcft- and right~hand main tanks was depleted below the

minimum of2,200 pounds. We are issuing this AD to detect and correct a single latent

failure of the FUEL CONFIG discrete signal, which disables both the FUEL CONFIG

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and LOW FUEL messages. Such failure, combined with a flightcrew CITorin contigurin~ INITI,\!.S!SI"

the fuel system, could lead to depletion of the fuel in the main tanks and possible flame

out of both engines. A dual engine flame out could result in inaccessibility of the

remaining fuel in the center tank due to loss of electrical power to the pumps, conscquen"b'NlTm,,"c>m,C[(;--

unrecoverable dual engine shutdown, and forced landing of the airplane. ~,,",;c,----
14910-13-PI

DEPARTMENT OF TRANSPORTATION

Federal Aviatioll Administration

ONr.URR~NC~S

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14 CFR Part 39 fiN/-{ - (if

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IDocket No. FAA-2010-++++; Directorate Identifier 201 O-NM-207-ADj Amendrnen

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39-**; AD 2010-**-**1

R1N 2120-AA64

Airworthiness Directives; The Boeing Company Model 757 and 767 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACT10N: Final rule; request for comments.

INIrlALSlSIG

SUMMARY: We are adopting a new airworthiness directive (AD) for the products list

above. This AD requires repetitive testing for correct functioning of the engine jndicatio

ou"ng Symbo'

and crew alerting system (EICAS) to ensure that it receives both the LOW FUEL and

FUEL CONFIG discrete signals from the fuel quantity processor unit (FQPU), and alert

the flightcrew ofa low fuel situation, and if the lest fails, troubleshooting to find wire

faults and damaged equipment, and corrective actions if necessary. This AD was

prompted by a report that the EICAS failed to alert the flightcrew of an improper fuel

system configuration during fJight. Later in that fhght the EICAS failed to alert the

tlightcrew that the fuel in the lefl- and right-hand main tanks was depleted below the

minimum of2,200 pounds. We are issuing this AD to detect and correct a single latent

failure orthe FUEL CONFIG discrete signal, which disables both the FUEL CONFIG

and LOW FUEL messages. Such failure, combined with a tlightcrew error in configurin

the fuel system, could lead to depletion of the fuel in the main tanks and possible flame

out of both engines. A dual engine flame out could result in inaccessibility of the

remaining fuel in the center tank due to loss of electrical power to the pumps, consequen

unrecoverable dual engine shutdown, and forced landing of the airplane.

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[4910-13-Pj

DEPARTMENT OF TR.o.NSPORTA nON

Federal Aviation Administration

fUIEtICES

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14 CFR Part 39 fIJi -I

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[Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-207-AD; Ameodmen

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39-**; AD 20] 0-**-**]

R1N 2l20-AA64

Airworthiness Directives; The Boeing Company Model 757 and 767 Airplanes

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AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

SUM1\'lARY: We are adopting a oe'\\' airworthiness directive (AD) for the products liste

"" above. This AD requires repetitive testing for correct functioning of the engine indicatio / LJ - !J~ILl

and crew alerting system (EICAS) to ensure that it receives both the LOW FUEL and

FUEL CONFIG discrete signals from the fuel quantity processor unit (FQPU), and alert

the flightcrew of a low fuel situation, and if the lest fails, troubleshooting to find wire

faults and damaged equipment, and corrective actions if necessary_ This AD was

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prompted by a report that the EICAS failed to alert the flightcrew oran improper fuel

system configuration during flight. Later in that flight the El~AS failed to alert the

flightcrew that the fuel in the left- and right-hand main tanks was depleted below the ovntlG S~M~O•.

minimum 0[2,200 pounds. We are issuing this AD to detect and correct a single latent

failure of the FUEL CON FIG discrete signal, which disables both the FUEL CONFTG

and LOW FUEL messages. Such failure, combined with a flightcrew error in configurin

the fuel system, could lead to depletion of the fuel in the main tanks and possible flame

out of both engines. A dual engine flame out could result in inaccessibility of the

flIllAI.SISIG

remaining fuel in the center tank due to loss of electrical power to the pumps, consequen ovnNG S"fM6OI.

unrecoverable dual engine shutdown, and forced landing of the airplane.

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