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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

170-100LR,ER~h;;~;r~O~~:I~~J~t'~~:~~ ~~~~~c~~~_~~OE~~b~:e~R~~~~~2g~~I~ 7:;~°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 in Embraer Service Bulletin 170-24-0048,

original issue, or further revisions app~oved by the ANAC.

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 in loss of

the related balance washer causing a pbssible 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 contTols hydrahlic 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

in the indicated time limit.

REQUIRED ACTION:

Inspection, replaceme\ll and identification, if necessary, of the airplane ram a If turbine.

COMPLIANCE:

Required as indicatedibelOw, 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 r RAT general visual inspection (GVI) to check its model, PiN and

SIN, or check in the applicable maintebance records, the RAT identification.

. (1) If the RAT SIN lnot listed as specified in this AD APLICAnIUTY paragraph, no

action is required at this time. . I

(2) If the RAT SiN is listed as specified 111 this AD APPICABLLITY paragraph, check if

the symbol "24-5" is marked on the MY identification plate. In positive case, no action is requircd at this

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, iL is not permitted to install a

replacement/spare Hamilton SUlldstr~l1d RAT, Model ERPS37T, PIN 1703781 Series wilb one of the

SINs listed U1 this AD APLLlCABILfrY paragraph, unless it is identified with the symbol "24-5" 011 the

identification plate. I

I
CONTINUATION 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, failUre or

irregularity. This level of inspection is made froin within touching distance, unless otherwise specified. A

mirror may be necessary to enhance visual acccs!s to all exposed surfaces in the 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 or opening of access panels or doors. Stands, ladders or

pl<ltfoJl11Smay be required to gain proximity to the area being checked."

The detailed instmctions and ~roeedures to accomplish this AD are described in the

Embracr Service Bulletin No. 170-24-0048, original issue, or further revisions approved by the ANAC.

Record compliance with this AD in the applicable maintenance log book.

CONTACT:

For additional technical information, contact

National Civil Aviation Ag~ncyl:- ANAC

Aeronautical Products CertIficatIOn Branch - ooer

Av. Cassiano Ricardo, 521, Bloto B, 2~andar, Parquc Residencial Aquarius

Fax: 55 (12) 3797-2330 I

12246-870 -Sao Jose dos Campos - sr, BRAZIL.

E-mail. pac@;un2lc_gov.hr

APPROVAL:

ADEWR ANT6NIO DA SILVA

General Manager

OOCP

DINO ISHIKURA

A'f1,VOlihinessSuperintendent

ANAC

Non:: Original III Portuguese language signed and available ill the files of the Aeronautical ProdLlets

Certification Branch (GOCP) of the Ndtional Civil Aviation Agency (ANAC).

Form F-900-04E