# ,,~ ANAC AGENCIA NAOIONAL DE 

### AVIACAO CIVIL

- BRAZIL 

## BRAZILIAN AIRWORTHINESS DIRECTIVE AD No.: 2010.()6..o4 Effective Date: 26Jul. 2010

Form F-900·04E TI]() roLl""i,,'J i.lr"zilian Ai.rwo.rthiness Directive IADi, iS5ued by ,he y,gencicl NilCio"",I d" ,wia',',](J Giv.LI IANACI in <lCcoroilllce with provisions of ChapLer IV, Title III of Codigo 8ri'lslldro ,J", r"'J;onautica

- La~' No. "1,56'5 dated 19 n"cemb('r 1986

- and Regulamento BrasLlei co de H"Jtl(iloq"','ao A"w,d'lltica (f(SHI\I 39, "pp.lics LO .,'1] aiI:n",Jft c"egi"tered in the ReYlstr:ol A""onautic<) BrasilGiw. No per:~Gn "HY "poratq ;on airGralt Lo ·~\tj(:h this AI! "ppl.les, un.Less it has pLevlously ccmplied '.'ith the re'luirE'm",nts e~tabli~h"d her"ln.

AD No. 2010-06-04 -IEMBRAER - Amendment 39-1304. 

### APPLICABlLlTY: I 170-100 LR,ER~h;;~;r~O~~:I~~J 

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# °riR~'I;[~O_I;~~ SU auplanes equipped with Hamilton ,Sundstrand ram air turbine (RAT), Model ERPS37T, Part Number (PIN) 1703781 Series; with the serial Jumbers (SIN) contained inEmbraer Service Bulletin 170-24-0048, original issue, orfurther revisions app~oved bytheANAC.

CANCELLATION /REVISION: N/A. REASON: 1t has been found oocun-ence of screw units manufactured with metal10graphic nOlJconfomlity that may increase their susbeptibility 10brittle fracture. The screw failure may result inloss of the related balance washer causing apbssible ram air turbine (RAT) imbalance event, which may result in RAT structural failure, which associa\ed with an electrical emergency situation, could result in loss of power to airplane flight contTolshydrahlic back-up system.

Since this condition ~ay occur in other airplanes of the same type and affects night safety, a corrcctivc action is required. Thus, sufficient reason exists to request compliance with this AD intheindicated time limit.

REQUIRED ACTION: Inspection, replaceme\ll and identification, ifnecessary, ofthe airplane ram aIf turbine. COMPLIANCE: Required asindicatedibelOw, unless already accomplished. (a) Within the next 1200 flight hours (FH) or 6 months after the effective dale ofrhis AD, whichever occurs first, cany out

# rRAT general visual inspection (GVI) to check its model, PiN and SIN, orcheck inthe applicable maintebance records, theRAT identification.

. (1) Ifthe RAT SIN

# lnot listed as specified inthis AD APLICAnIUTY paragraph, no action isrequired atthis time.
. 

# I

(2) Ifthe RAT SiN is listed as specified 111this AD APPICABLLITY paragraph, check if the symbol "24-5" ismarked onthe

# MY identification plate. Inpositive case, no action isrequircd atthis time. Nevertheless, if the symbol is ~ot marked, then replace the RAT balance screw and identify Ihe RAT identification plate with the symbol, "24-5".

(b) After the accol~plishl11ent of item (a) above, iLis not permitted to install a replacement/spare Hamilton SUlldstr~l1dRAT, Model ERPS37T, PIN 1703781 Series wilb one of the SINs listed U1 this AD APLLlCABILfrY paragraph, unless itis identified with the symbol "24-5" 011 the identification plate. I

ICONTINUATION OF AD No.: 2010·06..Q4 • AMENDMENT 39·1304 PAGE No.: 212

NOTE: For the purpose of this AD, a general visual lllspection (OVI) is: "A visual examination of an interior or exterior area, instdllation or assembly to detect obvious damage, failUreor irregularity. This level ofinspection ismade froin within touching distance, unless otherwise specified. A mirror may be necessary toenhance visual acccs!sto allexposed surfaces inthe inspection area. This level of inspection is made under nonnally availablp lighting conditions such as daylight, hangar lighting, nashlight or drop-light, and may require remov~1 oropening ofaccess panels ordoors. Stands, ladders or pl<ltfoJl11S

may berequired togain proximity to the areabeing checked." The detailed instmctions and ~roeedures to accomplish this AD are described in the Embracr Service Bulletin No. 170-24-0048, original issue, orfurther revisions approved by theANAC.

Record compliance with this AD inthe applicable maintenance logbook. CONTACT: For additional technical information, contact National Civil Aviation Ag~ncyl:- ANAC Aeronautical Products CertIficatIOn Branch

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## ooer Av. Cassiano Ricardo, 521, Bloto B,2~andar, Parquc Residencial Aquarius Fax: 55 (12) 3797-2330 I 12246-870 -Sao Jose dos Campos

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## sr, BRAZIL. E-mail. pac@;un2lc_gov.hr APPROVAL:

ADEWR ANT6NIO DA SILVA General Manager OOCP

DINO ISHIKURA A'f1,VOlihinessSuperintendent

ANAC 

## Non:: Original IIIPortuguese language signed and available ill the files of the Aeronautical ProdLlets Certification Branch (GOCP) oftheNdtional Civil Aviation Agency (ANAC).

Form F-900-04E