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DEPARTMENT OF TRANSPORTATION Federal Aviation Administration -ONCUHRENCES oum'G SYMBOl

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loss ofvisibility. and injuries to or incapacitation ofthe flight crew. inspections forthat flightdeck window 1.This proposed AD results from several reports KOUn"G $VNBOl 

### /lhOliS We are proposing this AD to prevent smoke and fire inthe cockpit, which could lead to ofelectrical arcs atthe terminal blocks ofthe electrically heated flightdeck window 1. allow for replacing the flightdeck window 1 with anew improved flightdeck window flightdeck window 1,and corrective actions ifnecessary. This proposed AD would also require repetitive inspections fordamage ofthe electrical terminal atthe left and right 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-40 equipped with different electrical cOimections, which would terminate the repetitive 747-400F, 747SR, and 747SP Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, RIN 2120-AA64 747-400D, 747-400F, 747SR, and 747SP series airplanes. This proposed AD would SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mod [Docket No. FAA-2010-1 t III; Directorate Identifier 2010-NM-221-AD) 14CFR Pari 39

DATES: We must receive comments on this proposed AD by [INSERT DATE 45 INIIIAl.5i5TG DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: You may send conunents by any ofthe following methods: • Federal eRulemaking Portal: Go tohttp://w\\'w.reeulations.eov. Follow the instructions for submitting comments.14910-13-Pj

DEPARTMENT OF TRAi\lSPORTATION Federal Aviation Administration ~OHt;URJ<fNn5 oun'IG SYMBOl

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# II ID DATES: We must receive comments on this proposed AD by [INSERT DATE 45 ADDRESSES: You may send corrunents by any ofthe following methods: DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. We are proposing tlus AD 10prevent smoke and fire inthe cockpit, which could lead to LJA f loss ofvisibility, and iilJ·unesto or incapacitation ofthe night crew. 

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### ~-I/..J, RIN 2120-AA64 747-400D, 747-400F, 747SR, and 747SP series airplanes. This proposed AD would ofelectrical arcs atthe tenninaJ blocks ofthe electrically heated nightdeck window 1. flightdeck window 1,and corrective actions ifnecessary. This proposed AD would also allow for replacing the flightdeck window 1with anew improved flightdeck window 747-100B SOD, 747-200B, 747-200C, 747-200F, 747-300,747-400,747-4000, require repetitive inspections fordamage ofthe electrical terminal atthe left and right 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-40 SUMMARY: We propose to adopt anew airworthiness directive (AD) forcertain Mod Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-400F, 747SR, and 747SP Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). (Docket No. FAA-2010-+++++; Directorate Identifier 2010-NM-221-AD] 14CFR Part 39

• Federal cRulemaking Portal: Go tohttp://www.re2ulations.gov. Follow the 1Ilstructions forsubmitting comments. 

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