Commonwealth legislation

AD/CESSNA 560/1 - Engine Flow Divider Start Valve Diaphragm

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legislative instrument

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This Airworthiness Directive (issued by the Civil Aviation Safety Authority) requires operators of Cessna 560 aircraft with Pratt & Whitney JT15D‑5A engines (unless modified per PWC SB 7372) to amend the Flight Manual and perform a flow‑divider modification per Pratt & Whitney service instructions to prevent uncommanded in‑flight engine shutdowns caused by start‑valve diaphragm deterioration. Operators bear the cost, must comply immediately (before further flight or within 50 hours, or by 1 Dec 1992), and update manuals and maintenance records to reflect the change.

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AD/CESSNA 560/1 - Engine Flow Divider Start Valve Diaphragm

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Cessna 560 (Citation V) Series Aeroplanes

AD/CESSNA 560/1 Engine Flow Divider Start Valve Diaphragm 13/92

Applicability: Cessna 560 series aircraft fitted with PWC JT15D-5A engines not incorporating Pratt and Whitney Canada Service Bulletin No. 7372.

Requirement: 1. Amend the Aircraft Flight Manual to reflect the requirements of Pratt and Whitney Canada Service Information Letter (SIL) No. 7060 Rev.1, Recommendation: Para. 1.

Action in accordance with the requirements of Pratt and Whitney Canada Service Bulletin No. 7371.

Note: Transport Canada Directive CF-92-19 refers.

Compliance: Effective 21 October 1992:

Before further flight.

2. Within 50 hours time in service, or before 1 December 1992, whichever occurs first.

Background: This Directive has been issued to reflect advice of two uncommanded in-flight engine shut-down events. The events resulted from deterioration of the engine flow divider start valve diaphragm. The Directive requires an amendment to the Aircraft Flight Manual to address a possible in-flight start valve failure event, and a modification of the flow divider to reduce the start valve diaphragm temperature pending the release of a terminating action.

Source text

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

1 AD/CESSNA 560/1 - Engine Flow Divider Start Valve Diaphragm