Md super 80 aircraft engines during refurbishment have the inlet cases sent to a specialized test sh...

Attributes
ACN	407531
Time
Date	199807
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	407531
Person 2
Affiliation	Other
Function	other personnel other
Qualification	other other : other
Events
Anomaly	non adherence : published procedure
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

This possible discrepancy was brought to my attention on jul/xa/98. Inlet cases (pn-xyz) that are off-loaded for refurbishment, per inspection job card, are sent for a manufacturer run. This run is to obtain concentricity of c-f (pn-xyz) which cannot be measured in our shop. Because of the nature of set-up and the program used at manufacturer, they do a 'complete' run on the case to include concentricity, runouts, drops, and idents that are not required per the inspection job card. It has always been shop practice, in concurrence with air carrier engineering, that the other recorded dimensions were to be considered for 'information only' and only dealt with if something was extremely out of limits. This has been the practice since at least 1990 or before. For several yrs, 'all' cases went through this process.

Original NASA ASRS Text

Title: MD SUPER 80 ACFT ENGS DURING REFURBISHMENT HAVE THE INLET CASES SENT TO A SPECIALIZED TEST SHOP AND TESTS PERFORMED EXCEED THE TESTS REQUIRED BY THE ACR ENGINEERING INSPECTION JOB CARD.

Narrative: THIS POSSIBLE DISCREPANCY WAS BROUGHT TO MY ATTN ON JUL/XA/98. INLET CASES (PN-XYZ) THAT ARE OFF-LOADED FOR REFURBISHMENT, PER INSPECTION JOB CARD, ARE SENT FOR A MANUFACTURER RUN. THIS RUN IS TO OBTAIN CONCENTRICITY OF C-F (PN-XYZ) WHICH CANNOT BE MEASURED IN OUR SHOP. BECAUSE OF THE NATURE OF SET-UP AND THE PROGRAM USED AT MANUFACTURER, THEY DO A 'COMPLETE' RUN ON THE CASE TO INCLUDE CONCENTRICITY, RUNOUTS, DROPS, AND IDENTS THAT ARE NOT REQUIRED PER THE INSPECTION JOB CARD. IT HAS ALWAYS BEEN SHOP PRACTICE, IN CONCURRENCE WITH ACR ENGINEERING, THAT THE OTHER RECORDED DIMENSIONS WERE TO BE CONSIDERED FOR 'INFO ONLY' AND ONLY DEALT WITH IF SOMETHING WAS EXTREMELY OUT OF LIMITS. THIS HAS BEEN THE PRACTICE SINCE AT LEAST 1990 OR BEFORE. FOR SEVERAL YRS, 'ALL' CASES WENT THROUGH THIS PROCESS.

Data retrieved from NASA's ASRS site as of July 2007 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.

Md super 80 aircraft engines during refurbishment have the inlet cases sent to a specialized test shop and tests performed exceed the tests required by the air carrier engineering inspection job card.