A mechanic reports his involvement with a blade seal that was found missing at the # 2 position in t...

Narrative:

I attended a fact-finding meeting in regards to a missing wheel well #2 blade seal on a B737-700 aircraft that fell off. The blade seal happened to fall off from the right main landing gear (medium large transport); where I changed four blade seals. I removed and replaced #11; 12; 13; and 15 (on the right medium large transport); #15 blade was the last seal I replaced. I finished installing it and went on to the next job on the wheel well. I must have installed the seal wrong. This was an honest mistake on my part. The blade was actually sandwiched between the upper and lower seal retainers. The mounting screws did not go through the holes of the seal between the seal retainer for security. The seal was sandwiched between the two seal retainers; but not secured with the mounting screws. This caused the blade seal to fall off from its original location during takeoff. This incident was a mistake on my part and I take full responsibility.

Original NASA ASRS Text

Title: A Mechanic reports his involvement with a blade seal that was found missing at the # 2 position in the right main landing gear (MLG) wheel well of a B737-700 aircraft.

Narrative: I attended a fact-finding meeting in regards to a missing wheel well #2 blade seal on a B737-700 aircraft that fell off. The blade seal happened to fall off from the right main landing gear (MLG); where I changed four blade seals. I removed and replaced #11; 12; 13; and 15 (on the right MLG); #15 blade was the last seal I replaced. I finished installing it and went on to the next job on the wheel well. I must have installed the seal wrong. This was an honest mistake on my part. The blade was actually sandwiched between the upper and lower seal retainers. The mounting screws did not go through the holes of the seal between the seal retainer for security. The seal was sandwiched between the two seal retainers; but not secured with the mounting screws. This caused the blade seal to fall off from its original location during takeoff. This incident was a mistake on my part and I take full responsibility.

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.

Attributes
ACN	850166
Time
Date	200907
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dawn
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Main Gear Door
Person 1
Function	Technician
Experience	Maintenance Technician 8
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

A mechanic reports his involvement with a blade seal that was found missing at the # 2 position in the right main landing gear (medium large transport) wheel well of a B737-700 aircraft.