Commonwealth legislation

AD/S-92/2 - Main Gearbox Lubrication Pump Vespel Spline Adapters

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires operators of Sikorsky S‑92A helicopters fitted with MGB pump P/N 92351‑15800‑101 and vespel spline adapter P/N 1584000‑1 to remove and replace the adapter per Sikorsky Alert Service Bulletin 92‑63‑001 (steps 3.A.(1)–(6)). Must be done before next flight and repeated every 50 flight hours. Stated purpose is to prevent loss of MGB lubrication and resulting drive or gear failure. Operators pay for parts, labour and downtime; the regulator enforces timing. (Applicability; Requirement; Compliance; Background)

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Current sections

Direct links to the current provisions in AD/S-92/2 - Main Gearbox Lubrication Pump Vespel Spline Adapters.

Sikorsky S-92 Series Helicopters

AD/S-92/2	Main Gearbox Lubrication PumpVespel Spline Adapters	2/2007 TX

Applicability:	Sikorsky Model S-92A helicopters with main gearbox (MGB) lubrication/scavenge pump, part number (P/N) 92351-15800-101, with vespel spline adapter, P/N 1584000-1, installed.
Requirement:	Remove and replace each MGB lubrication/scavenge pump vespel spline adapter in accordance with paragraph 3.A., steps (1) through (6) of the Accomplishment Instructions in Sikorsky Aircraft Corporation Alert Service Bulletin No. 92-63-001, dated 1 April 2005.Note: FAA AD 2005-12-03 Amdt 39-14119 dated 1 June 2005 refers.
Compliance:	Before further flight, unless accomplished previously, and thereafter, at intervals not to exceed 50 hours time-in-service.
	This Airworthiness Directive becomes effective on 18 December 2006.
Background:	This AD requires replacing the MGB lubrication/scavenge pump vespel spline adapters before further flight, and thereafter, replacing them at certain intervals. This is prompted by a reported incident of an in-flight loss of oil pressure. The actions specified in this AD are intended to prevent loss of lubrication to the MGB, which could cause failure of one or both engine input drives, or planetary gear to sun gear tooth mesh failure, resulting in loss of power to the rotor system and subsequent loss of control of the helicopter.

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James Coyne
Delegate of the Civil Aviation Safety Authority

13 December 2006

AD/S-92/2

Main Gearbox Lubrication PumpVespel Spli

Main Gearbox Lubrication PumpVespel Spline Adapters

Main Gearbox Lubrication Pump

Vespel Spline Adapters

2/2007 TX

Source text

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

Sikorsky S-92 Series Helicopters Sikorsky S-92 Series Helicopters

Sikorsky S-92 Series Helicopters

AD/S-92/2	Main Gearbox Lubrication PumpVespel Spline Adapters	2/2007 TX

Applicability:	Sikorsky Model S-92A helicopters with main gearbox (MGB) lubrication/scavenge pump, part number (P/N) 92351-15800-101, with vespel spline adapter, P/N 1584000-1, installed.
Requirement:	Remove and replace each MGB lubrication/scavenge pump vespel spline adapter in accordance with paragraph 3.A., steps (1) through (6) of the Accomplishment Instructions in Sikorsky Aircraft Corporation Alert Service Bulletin No. 92-63-001, dated 1 April 2005.Note: FAA AD 2005-12-03 Amdt 39-14119 dated 1 June 2005 refers.
Compliance:	Before further flight, unless accomplished previously, and thereafter, at intervals not to exceed 50 hours time-in-service.
	This Airworthiness Directive becomes effective on 18 December 2006.
Background:	This AD requires replacing the MGB lubrication/scavenge pump vespel spline adapters before further flight, and thereafter, replacing them at certain intervals. This is prompted by a reported incident of an in-flight loss of oil pressure. The actions specified in this AD are intended to prevent loss of lubrication to the MGB, which could cause failure of one or both engine input drives, or planetary gear to sun gear tooth mesh failure, resulting in loss of power to the rotor system and subsequent loss of control of the helicopter.

James Coyne
Delegate of the Civil Aviation Safety Authority

13 December 2006

AD/S-92/2 AD/S-92/2

AD/S-92/2

Main Gearbox Lubrication PumpVespel Spli Main Gearbox Lubrication PumpVespel Spline Adapters

Main Gearbox Lubrication Pump

Vespel Spline Adapters

Deep dive

Current sections

Sikorsky S-92 Series Helicopters

Sikorsky S-92 Series Helicopters

AD/S-92/2

AD/S-92/2

Main Gearbox Lubrication PumpVespel Spline Adapters

Main Gearbox Lubrication Pump

2/2007 TX

2/2007 TX

Source text

Sikorsky S-92 Series Helicopters Sikorsky S-92 Series Helicopters

Sikorsky S-92 Series Helicopters

AD/S-92/2 AD/S-92/2

AD/S-92/2

Main Gearbox Lubrication PumpVespel Spli Main Gearbox Lubrication PumpVespel Spline Adapters

Main Gearbox Lubrication Pump

2/2007 TX 2/2007 TX

2/2007 TX