<< >> NASA ASRS Report 792784, April 2008

A mechanic reports how two B757-200 aircraft sustained damage when the aft cowl latch access panel door opens in flight; causing damage to the reverser when deployed on landing rollout.

Attributes
ACN	792784
Time
Date	200804
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground other : under tow
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	792784
Events
Anomaly	maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : briefing performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : inspection
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Two aircraft this yr so far have sustained damage due to a recognized condition addressed in service tip maintenance manual where the aft cowl latch access panel door opens in-flight and causes damage to the reverser when deployed on rollout. The door bumper stop arm in ipc notes 2 components to be checked for wear in the service tip. These components cost about $200.00; where the reverser damage can cost $250;000.00 considering out-of-service time; reverser damage; ferry cost; etc.

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Original NASA ASRS Text

Title: A MECHANIC REPORTS HOW TWO B757-200 ACFT SUSTAINED DAMAGE WHEN THE AFT COWL LATCH ACCESS PANEL DOOR OPENS IN FLIGHT; CAUSING DAMAGE TO THE REVERSER WHEN DEPLOYED ON LANDING ROLLOUT.

Narrative: TWO ACFT THIS YR SO FAR HAVE SUSTAINED DAMAGE DUE TO A RECOGNIZED CONDITION ADDRESSED IN SVC TIP MAINT MANUAL WHERE THE AFT COWL LATCH ACCESS PANEL DOOR OPENS INFLT AND CAUSES DAMAGE TO THE REVERSER WHEN DEPLOYED ON ROLLOUT. THE DOOR BUMPER STOP ARM IN IPC NOTES 2 COMPONENTS TO BE CHKED FOR WEAR IN THE SVC TIP. THESE COMPONENTS COST ABOUT $200.00; WHERE THE REVERSER DAMAGE CAN COST $250;000.00 CONSIDERING OUT-OF-SVC TIME; REVERSER DAMAGE; FERRY COST; ETC.

Data retrieved from NASA's ASRS site as of May 2009 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.