[4910-13-P]

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2009-0609; Directorate Identifier 2009-NM-037-AD; Amendmen 

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### C-(,...-- R1N 2120-AA64 Airworthiness Directives; Bombardier Model DHC-8-1 02, DHC-8-103, DHC-8-1 06, DHC-8-201, and DHC-8-202 Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department ofTransportation (DOT).



### - 6\ Nl'rlALSISIG ACTION: Final rule. SUMMARY: We are adopting anew airworthiness directive (AD) for the products liste above. This AD results from mandatory continuing airworthiness information (MeAl) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MeAl describes the unsafe condition as: During apuncture voltage test ofthe aluminum-loaded paint on an in-service DHC-8 aircraft, conducted to validate an SFAR 88 [Special Fecl.eralAviation Regulation No. 88] related task, Bombardier Aerospace (BA) discovered that the top wing fuel tank skin between Ywl71.20 and Yw26l.00 was painted with anon-aluminized enamel coating 

## ** *. With this type ofpaint application, itis possible that, in the worst case scenario, alightning strike could puncture the wing skin and create an ignition source in the fuel tank. Ignition sources inside fuel tanks, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss ofthe airplane. We are issuing this A R01JIIN(; SYMBOL

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ANE-I72ANM-LGBABd-l7, DEPARTME;NT OF l'AANSPORTATION

39~*****;· AD  :..** -**) Feder·al Avi~tion AdmiiJistration 14CFR Part39 . IDocketNo~FAA-i009-06b9; Directorate Jilentifier·2009~NM-037,,:AD;AmendJJle'nt,

RIN 212Q,AA64 Airworthiness D'irectivcs.; BombardierModel DHe-8-1 0.2,DHC:~8-:103,D~CtS~ J06; DHC-8-201, and bHC-8~202$crics'Airplanes AGENCY: Federal Aviation Administration (FAA), 

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. .• .. '. ,.. . . _ '" ' . '. ""U""M,""i7riijl SUMMARY: y.,'eare ndopt:l.l}ga neW uJrWOl'tlllncss directive (AD) fo,rthe products. lIsted ANE-170 .,~ , above. This AQ results'fr~in~ mandat?ry conth!uing aiiworthJi10.SSinformation (M8AI) origimi.tedbyan aviation -authbrity'of-apoth~r cou,ntry to ide~tify and corrett an unsafe condition on an aviatjon 'p'fp-duct. Th_eMeAl describes-the:"uI1safe condition as:

" , During a pUIlCtllre-:voJ.tage fe~t oqhe alumjnum~l.oaAt.d'paj\1t. 9ll,'an , in-serVice ~flC':$ 

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## 'a~"'~F ARJ8rS'p~ci?t Federa.l:Aviall,onRe$u!atimi~N 6; ~8l'l:el~ted t~sk>:B0ID.Qardiet' ~erdsp~i:e (BA) discovered'th:aUthe tojJ..wlng fhel 

### t'~k'.skln.betweeil Yw 171.,20:'imd yw261.90was paihi~~~iitb

### a,non-aiumiiJ.izeq: ~namelcOiltiu&*" "'-. With this type.ofpaint'application, itis,possible that, in:the vml's~

__ case scenario, a lightning. strike could puncture (he wing skin and create an ignition sourceirl't'ile' fueHai~k. ' ", Ignition sources inside fuel tanks, in combination with flamrn:able fuel v:a~qr~.cOllld result in fuel tank explasi(:ms and conseqllent loss ofthe airpl.anc. We are issuing ,tl1 is AD Phm