Commonwealth legislation

AD/LYC/101 Amdt 1 - Superior Cylinders

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Commonwealth

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legislative instrument

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Requires operators of certain Lycoming TIO/LTIO-540 and IO-540-M1B5D engines fitted with specified Superior Air Parts cylinders (P/N SL54000‑A1, ‑A2, ‑A2P, ‑A20P, ‑A21P; serials 001–650) to carry out a visual inspection and an 80 psi “wet” leak check for combustion leaks or cracking near the inlet valve seat, remove any defective cylinder before further flight, and replace affected cylinders before 300 hours. The directive is presented as a safety measure to prevent cylinder‑head loss, engine power loss and possible fire (Requirement; Compliance; Background).

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AD/LYC/101 Amdt 1 - Superior Cylinders

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Lycoming Piston Engines

AD/LYC/101

Amdt 1

Superior Cylinders 3/97

Applicability: All Lycoming TIO/LTIO-540-A2C, -J2B, -F2BD, -J2BD, -N2BD, -R2AD, -S1AD

and IO-540-M1B5D engines fitted with Superior Air Parts Inc. cylinders part number (P/N) SL54000-A1, SL54000-A2, SL54000-A2P, SL54000-A20P and SL54000-

A21P with serials numbers 001 through 650.

Requirement: 1. To prevent the possible loss of a cylinder head, the subsequent loss of engine power and a possible engine fire, carry out:

A visual inspection of applicable cylinder assemblies for evidence of combustion leaks and/or cracking in the area adjacent to the location of the inlet valve seat as detailed in Figure 1, and

b. An 80psi pressure “wet” leak check of the cylinder assemblies paying particular attention to the area detailed in Figure 1.

Remove from service before further flight, any cylinder showing either combustion gas leakage or cracks.

Remove applicable cylinders from service.

Note 1: For the purpose of Requirement 1.(B), a wet leak check may be carried out by using soapy water or a commercial leak detector product such as “Sherlock Leak Detector”.

Note 2: FAA Airworthiness Directive 97-01-04 refers.

View image in the official source

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Compliance: 1. Cylinders with a time in service greater than 250 hours; within 5 hours time in service from the effective date of this directive and thereafter at intervals not to exceed 25 hours time in service.

Cylinders with a time in service less than 250 hours; prior to exceeding 250 hours time in service and thereafter at intervals not to exceed 25 hours time in service.

Prior to exceeding 300 hours cylinder time in service. This Amendment becomes effective on 27 February 1997.

Background: This directive was originally issued to require the inspection of certain cylinder assemblies. The requirement follows the CASA investigation of a PA31-350 cylinder head failure in service. This amendment reflects the issue of an FAA airworthiness directive based on the results on the CASA investigation and the subsequent revision to the cylinder manufacturer’s published requirements.

FAA Airworthiness Directive 97-01-04 increases the engine models applicable, reduces the compliance threshold and adds a terminating action by replacement of affected cylinders.

The original issue of this Airworthiness Directive became effective on 27 November 1996.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/LYC/101 Amdt 1 - Superior Cylinders

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Lycoming Piston Engines

AD/LYC/101

Amdt 1

Superior Cylinders 3/97

Applicability: All Lycoming TIO/LTIO-540-A2C, -J2B, -F2BD, -J2BD, -N2BD, -R2AD, -S1AD

and IO-540-M1B5D engines fitted with Superior Air Parts Inc. cylinders part number (P/N) SL54000-A1, SL54000-A2, SL54000-A2P, SL54000-A20P and SL54000-

A21P with serials numbers 001 through 650.

Requirement: 1. To prevent the possible loss of a cylinder head, the subsequent loss of engine power and a possible engine fire, carry out:

A visual inspection of applicable cylinder assemblies for evidence of combustion leaks and/or cracking in the area adjacent to the location of the inlet valve seat as detailed in Figure 1, and

b. An 80psi pressure “wet” leak check of the cylinder assemblies paying particular attention to the area detailed in Figure 1.

Remove from service before further flight, any cylinder showing either combustion gas leakage or cracks.

Remove applicable cylinders from service.

Note 1: For the purpose of Requirement 1.(B), a wet leak check may be carried out by using soapy water or a commercial leak detector product such as “Sherlock Leak Detector”.

Note 2: FAA Airworthiness Directive 97-01-04 refers.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Cylinders with a time in service less than 250 hours; prior to exceeding 250 hours time in service and thereafter at intervals not to exceed 25 hours time in service.

Prior to exceeding 300 hours cylinder time in service. This Amendment becomes effective on 27 February 1997.