An inspector reports about the practices and job card procedures that are not being followed during ...

Attributes
ACN	958123
Time
Date	201107
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	No Aircraft
Component
Aircraft Component	Engine Oil Seals
Person 1
Function	Inspector
Qualification	Maintenance Airframe Maintenance Powerplant
Experience	Maintenance Inspector 21 Maintenance Technician 13
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

Pratt-whitney PW2000 engine serial number XXXX; was the engine off of a B757-200 aircraft that failed climbing out of 25;000 ft from ZZZ. It should be noted that at its last maintenance visit; the diffuser [section] had 12;450 hours on it; yet was not [subjected to] heavy maintenance; but a [lighter] module inspection; also known as a short build. The # 4 bearing front carbon seal assembly on that PW2000 was routinely; as dictated by maintenance planning; most likely had the carbon element removed and a replacement installed into an unserviceable seal support. The seal ring was not replaced and the ring groove was not checked; nor was the seal assembly pressure/flow checked. The serviceable limit of the seal ring groove; when exposed; is parallel (flat) within 0.001 of an inch.

Original NASA ASRS Text

Title: An Inspector reports about the practices and job card procedures that are not being followed during the build-up of their overhauled PW2000 engines that led to another engine failure.

Narrative: Pratt-Whitney PW2000 Engine Serial Number XXXX; was the engine off of a B757-200 aircraft that failed climbing out of 25;000 FT from ZZZ. It should be noted that at its last Maintenance Visit; the Diffuser [section] had 12;450 hours on it; yet was not [subjected to] Heavy Maintenance; but a [lighter] Module Inspection; also known as a Short Build. The # 4 bearing Front Carbon Seal Assembly on that PW2000 was routinely; as dictated by Maintenance Planning; most likely had the Carbon Element removed and a replacement installed into an unserviceable Seal Support. The Seal Ring was not replaced and the Ring Groove was not checked; nor was the Seal Assembly pressure/flow checked. THE SERVICEABLE LIMIT OF THE SEAL RING GROOVE; WHEN EXPOSED; IS PARALLEL (FLAT) WITHIN 0.001 OF AN INCH.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

An inspector reports about the practices and job card procedures that are not being followed during the build-up of their overhauled PW2000 engines that led to another engine failure.