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AD/EMB-145/15 - APU Exhaust Duct Cracks
Embraer EMB-135 and EMB-145 Series AeropEmbraer EMB-135 and EMB-145 Series Aeroplanes
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Embraer EMB-135 and EMB-145 Series Aeroplanes
| AD/EMB-145/15 | APU Exhaust Duct Cracks | 8/2008 |
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| Applicability: | Embraer EMB-145( ) aircraft, serial numbers 145601, 145614 and 145626, fitted with APU cowling exhaust assembly P/N 145-52460-401, which forms part of APU cowling assembly P/N 145-52979-401. |
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| Requirement: | 1. Carry out a detailed visual inspection with a magnifying glass of 8X minimum in all APU exhaust gusset strap area, with emphasis in the spot weld points. If any crack is found, replace the exhaust duct with another bearing or cut the damaged duct P/N 145-50348-001 after the gusset strap area, preserving all not affected welded points.2. Repeat the inspection until the exhaust duct is replaced with another bearing with a different P/N not affected by this AD.The detailed instructions and procedures to accomplish this AD are described in the Embraer Alert Service Bulletin No. 145-49-A023, original issue, or further revisions approved by the CTA.Note: SERVIÇO PÚBLICO FEDERAL DEPARTAMENTO DE AVIAÇÃO CIVIL AD 2002-11-02 dated 28 November 2002 refers. |
| Compliance: | For Requirement 1 - Within 50 flight hours after the effective date of this AD, unless previously accomplished.For Requirement 2 - At intervals not exceeding 50 flight operating hours. |
| This Airworthiness Directive becomes effective on 31 July 2008. | |
| Background: | Two cases of cracks in the non-silenced APU exhaust duct extension have been found which could lead to a duct separation during flight. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
20 June 2008