A DC9-30 was dispatched in non compliance with a left pylon repair not corrosion treated per the rep...

Attributes
ACN	500550
Time
Date	200102
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 6
ASRS Report	500550
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : person 1
Resolutory Action	none taken : unable
Consequence	other
Factors
Maintenance	contributing factor : engineering procedure contributing factor : work cards performance deficiency : repair performance deficiency : inspection
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

I was doing a modification on the left upper pylon spar for the first time. I was also training a person on the indicator panel which connects the spar to the fuselage. The upper pylon spar consists of 2 pieces of right angle stainless steel and 2 straps which are nested together inside the angles. I radiused the lower strap to meet up into the upper strap, clamped in place and drilled the holes. Once this was done, the holes were deferred and cold worked installed in the aircraft and inspected. My concern was, I am not 100% sure if I primed the edge of the strap before installing. Once the straps are nested together, the edges can't be seen. I brought this concern to my safety and standards person who was also crew chief in the shop where the parts were made. He told me that straps were made of A286 stainless steel, and even if I had forgot to prime the edge, corrosion wouldn't be an issue.

Original NASA ASRS Text

Title: A DC9-30 WAS DISPATCHED IN NON COMPLIANCE WITH A L PYLON REPAIR NOT CORROSION TREATED PER THE REPAIR DOCUMENT.

Narrative: I WAS DOING A MODIFICATION ON THE L UPPER PYLON SPAR FOR THE FIRST TIME. I WAS ALSO TRAINING A PERSON ON THE INDICATOR PANEL WHICH CONNECTS THE SPAR TO THE FUSELAGE. THE UPPER PYLON SPAR CONSISTS OF 2 PIECES OF R ANGLE STAINLESS STEEL AND 2 STRAPS WHICH ARE NESTED TOGETHER INSIDE THE ANGLES. I RADIUSED THE LOWER STRAP TO MEET UP INTO THE UPPER STRAP, CLAMPED IN PLACE AND DRILLED THE HOLES. ONCE THIS WAS DONE, THE HOLES WERE DEFERRED AND COLD WORKED INSTALLED IN THE ACFT AND INSPECTED. MY CONCERN WAS, I AM NOT 100% SURE IF I PRIMED THE EDGE OF THE STRAP BEFORE INSTALLING. ONCE THE STRAPS ARE NESTED TOGETHER, THE EDGES CAN'T BE SEEN. I BROUGHT THIS CONCERN TO MY SAFETY AND STANDARDS PERSON WHO WAS ALSO CREW CHIEF IN THE SHOP WHERE THE PARTS WERE MADE. HE TOLD ME THAT STRAPS WERE MADE OF A286 STAINLESS STEEL, AND EVEN IF I HAD FORGOT TO PRIME THE EDGE, CORROSION WOULDN'T BE AN ISSUE.

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.

A DC9-30 was dispatched in non compliance with a left pylon repair not corrosion treated per the repair document.