Form F-900-04E

AGÊNCIA NACIONAL DE AVIAÇÃO CIVIL – BRAZIL

BRAZILIAN AIRWORTHINESS DIRECTIVE

AD No.: 2010-06-03R1 Effective Date: 20 Sep. 2010

The following Brazilian Airworthiness Directive (AD), issued by the Agência Nacional de Aviação Civil 

(ANAC) in accordance with provisions of Chapter IV, Title III of Código Brasileiro de Aeronáutica - Law No. 

7,565 dated 19 December 1986 - and Regulamento Brasileiro de Homologação Aeronáutica (RBHA) 39, applies to 

all aircraft registered in the Registro Aeronáutico Brasileiro. No person may operate an aircraft to which 

this AD applies, unless it has previously complied with the requirements established herein.

AD No. 2010-06-03 – EMBRAER – Amendment 39-1314.

APPLICABILITY:

This Airworthiness Directive (AD) is applicable to EMBRAER models EMB-145, EMB145EP, EMB-145ER, EMB-145EU, EMB-145LR, EMB-145LU, EMB-145MK, EMB-145MP, EMB145MR, EMB-135ER, EMB-135KE, EMB-135KL, and EMB-135LR airplanes; equipped with Titanium

Auxiliary Power Unit (APU) firewall part number (PN) 145-47494-401 or 145-26850-401 or 145-26850-

601 or 145-47494-403.

CANCELLATION / REVISION:

This AD cancels and supersedes AD No. 2010-06-03, amendment 39-1303 and is being 

issued to revise its applicability.

REASON:

This AD results from reports of cracking in the firewall of the auxiliary power unit 

(APU). This AD is being issued to detect and correct this cracking, which could result in reduced 

structural integrity of the fuselage and empennage in the event that a fire penetrates through the firewall 

of the APU.

Since this condition can affect flight safety, a corrective action is required. Thus, 

sufficient reason exists to request compliance with this AD in the indicated time limit.

REQUIRED ACTION:

Inspection, rework or replacement of APU firewall.

COMPLIANCE:

Required as indicated below unless already accomplished.

(a) Within 3300 flight hours (FH) after the effective date of this AD, perform a detailed 

inspection (DET) for cracking of the rearward and forward face of the APU firewall, including its 

attachment to the fuselage removing neither the structural reinforcements nor the dampers. If no cracking 

is found repeat the inspection thereafter at intervals not to exceed 6600 FH until paragraph (c) of this AD 

is accomplished;

(b) If any crack is found during any inspection required by paragraph (a) of this AD, 

before further flight, repair in accordance with the instructions presented in the EMB-145 Structural 

Repair Manual (SRM) 1142 - chapter 53-32-13, Rear Fuselage II - APU Firewall - Repairs. Additionally 

a repair approved by the ANAC may be performed. After performing the repair, repeat the inspection 

thereafter at intervals not to exceed 6600 FH until paragraph (c) of this AD is accomplished;

(c) Replacing the APU firewall PN 145-47494-401 or 145-26850-401 or 145-26850-601 

or 145-47494-403, for a new one of PN 145-47494-607, in accordance with the instruction of 

EMBRAER service bulletin No. 145-53-0062 original issuance or further revisions approved by the 

ANAC, constitute the final action for the repetitive inspection required on paragraphs (a) and (b).
CONTINUATION OF AD No.: 2010-06-03R1 - AMENDMENT 39-1314 PAGE No.: 2/2

Form F-900-04E

NOTE: For the purpose of this AD, a detailed inspection is: "An intensive examination 

of a specific item, installation or assembly to detect damage, failure or irregularity. Available lighting is 

normally supplemented with a direct source of good lighting at an intensity deemed appropriate. 

Inspection aids such as mirrors, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate 

access procedures may be required."

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

CONTACT:

For additional technical information, contact:

National Civil Aviation Agency – ANAC

Aeronautical Products Certification Branch – GGCP

Av. Cassiano Ricardo, 521, Bloco B, 2o andar, Parque Residencial Aquarius

Fax: 55 (12) 3797-2330

12246-870 – São José dos Campos - SP, BRAZIL.

E-mail: pac@anac.gov.br

APPROVAL:

HÉLIO TARQUINIO JUNIOR

Acting General Manager

GGCP

DINO ISHIKURA

Airworthiness Superintendent

ANAC

NOTE: Original in Portuguese language signed and available in the files of the Aeronautical Products 

Certification Branch (GGCP) of the National Civil Aviation Agency (ANAC).