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DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 

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## nDocket No. FAA-2010-++++j Directorate Identifier 20] O-NM-207-ADj Amendmen 

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.. RIN 2120-AA64 Airworthiness Directives; The Boeing Company Model 757 and 767 Airplanes ll,lNL'U"",NCH' "OUT'NG ,,"MROt

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AGENCY: Federal Aviation Administration (FAA), DOT. ACTiON: 

### Final rule; request for comments.
DAn SUMMARY: We are adopting anew airworthiness directive (AD) for the products liste i")ler

# Ii 0 above. This AD requires repetitive testing for correct functioning ofthe engine indicatio 

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INITIAL.O!S1G and crew alerting system (EICAS) to ensure that itreceives both the LOW FUEL and 

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

# I.~ the flightcrew ofalow fuel situation, and ifthe test fails, troubleshooting to find wire faults and damaged equipment, and corrective actions ifnecessary. This AD was prompted by areport that the EICAS failed to alert the flightcrew ofan improper fuel system configuration during flight. Later inthat flight the EICAS failed to alert the flightcrew that the fuel inthe lcft- and right~hand main tanks was depleted below the minimum of2,200 pounds. We are issuing this AD to detect and correct asingle latent failure ofthe FUEL CONFIG discrete signal, which disables both the FUEL CONFIG RmmNG WMROL

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and LOW FUEL messages. Such failure, combined with aflightcrew CITor in contigurin~ INITI,\!.S!SI" the fuel system, could lead to depletion ofthe fuel inthe main tanks and possible flame out ofboth engines. A dual engine flame out could result ininaccessibility ofthe remaining fuel in thecenter tank due to loss ofelectrical power to the pumps, conscquen"b'NlTm,,"c>m,C[(;--- unrecoverable dual engine shutdown, and forced landing ofthe airplane. 

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DEPARTMENT OFTRANSPORTATION Federal Aviatioll Administration ONr.URR~NC~S \ounm:; smeOl 14CFR Part 39 

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## Wil5<n IDocket No. FAA-2010-++++; Directorate Identifier 201O-NM-207-ADj Amendrnen 

## '" 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 anew airworthiness directive (AD) for the products list above. This AD requires repetitive testing for correct functioning ofthe 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 ifthe lest fails, troubleshooting to find wire faults and damaged equipment, and corrective actions ifnecessary. This AD was prompted by areport that the EICAS failed to alert the flightcrew of an improper fuel system configuration during fJight. Later inthat 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 asingle 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 ofthe fuel inthe main tanks and possible flame out ofboth engines. A dual engine flame out could result in inaccessibility ofthe remaining fuel inthe center tank due to loss ofelectrical power to the pumps, consequen unrecoverable dual engine shutdown, and forced landing ofthe airplane. OUl'NG SYMBOL



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lNlTlAlS;SlG[4910-13-Pj DEPARTMENT OF TR.o.NSPORTA nON Federal Aviation Administration fUIEtICES au"".. SY"501 14CFR Part 39 

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## I il,wism [Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-207-AD; Ameodmen 'n 39-**; AD 20] 0-**-**] R1N 2l20-AA64 Airworthiness Directives; The Boeing Company Model 757 and 767 Airplanes 

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\0 \v «au NG" M60l AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request forcomments. SUM1\'lARY: We are adopting a oe'\\' airworthiness directive (AD) forthe products liste 

## "" above. This AD requires repetitive testing forcorrect functioning ofthe engine indicatio /LJ
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### J~ ILl and crew alerting system (EICAS) to ensure that itreceives 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 ifthe lest fails, troubleshooting to find wire faults and damaged equipment, and corrective actions ifnecessary_ This AD was OUTltlG ""'M~OL prompted by areport 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 thatthe 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 asingle latent failure oftheFUEL 

### CONFIG discrete signal, which disables both the 

### FUEL CONFTG and LOW FUEL messages. Such failure, combined with a flightcrew error inconfigurin the fuel system, could lead todepletion ofthe fuel inthe main tanks and possible flame out ofboth engines. Adual engine flame out could result in inaccessibility ofthe flIllAI.SISIG remaining fuel inthe center tank due to loss ofelectrical power to the pumps, consequen ovnNG S"fM6OI. unrecoverable dual engine shutdown, and forced landing ofthe airplane.



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