Several flights after performing a number 6 bearing oil supply tube flow check on a ge CF6-80c2; num...

Narrative:

When performing number 2 engine oil supply tube flow check on number 6 bearing; the reading on the pressure gauge of the test equipment read between 30.5 and 31 psi. I tighten fitting on tester to oil supply tube and reading was then right at 31 psi. The task card read; if 27 psi or less ok for service. If gauge read 27- 31 psi; I could defer; if pressure above 31 psi; item had to be repaired prior to the next flight. I conferred with the lead mechanic and he in turn called the maintenance co-coordinator; explained what we had and maintenance co-coordinator said we could defer. I followed the process to defer item for five flight cycles; stating in log sheet the pressure was at 31 psi. Two days later; after aircraft had made several flights and was out of the country; someone was reviewing the maintenance computer list of log inputs to clear items and in their judgment; felt that the aircraft was out of compliance with the statement of 31 psi that was stated on the log sheet. I was notified of the maintenance event.

Original NASA ASRS Text

Title: Several flights after performing a Number 6 bearing Oil Supply Tube Flow Check on a GE CF6-80C2; Number Two engine; an Aircraft Maintenance Technician (AMT) was informed the MEL deferral he created for the borderline high pressure oil reading was out of compliance.

Narrative: When performing Number 2 Engine Oil Supply Tube Flow Check on Number 6 bearing; the reading on the pressure gauge of the test equipment read between 30.5 and 31 psi. I tighten fitting on Tester to oil supply tube and reading was then right at 31 psi. The Task Card read; if 27 psi or less OK for service. If gauge read 27- 31 psi; I could defer; if pressure above 31 psi; item had to be repaired prior to the next flight. I conferred with the Lead Mechanic and he in turn called the Maintenance Co-coordinator; explained what we had and Maintenance Co-coordinator said we could defer. I followed the process to defer item for five flight cycles; stating in Log sheet the pressure was at 31 psi. Two days later; after aircraft had made several flights and was out of the country; someone was reviewing the Maintenance computer list of log inputs to clear items and in their judgment; felt that the aircraft was out of compliance with the statement of 31 psi that was stated on the Log sheet. I was notified of the maintenance event.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1120755
Time
Date	201310
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	B767-400 and 400 ER
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Compressor Bearing
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe Maintenance Avionics
Experience	Maintenance Technician 25
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Several flights after performing a number 6 bearing oil supply tube flow check on a ge CF6-80c2; number two engine; an aircraft maintenance technician (amt) was informed the MEL deferral he created for the borderline high pressure oil reading was out of compliance.