After completing an assigned check on a B757-200 #1 engine; two mechanics are later informed of thru...

Attributes
ACN	776591
Time
Date	200802
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
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	776591
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	776590
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

I was assigned to do a check on #1 engine of aircraft X together with mr xxxxx. After the job card was accomplished; we started the engine close-up. We made sure every panel was secured and properly latched. Upon landing in ZZZ; it was found that the reverser was damaged due to an open access door. It is not known if the door accidentally opened due to landing procedure. Supplemental information from acn 776590: upon arrival at ZZZ; found #1 engine thrust reverser cowl damaged. Callback conversation with reporter acn 776591 revealed the following information: reporter stated that one of the two lower access panels for the fan duct cowl and thrust reverser cowl latches came open and was damaged during thrust reverser operation on landing. Reporter also stated his carrier is aware of similar problems with the latches for the access panel not remaining secured and latched. His company maintenance engineering is considering some type of improvement to keep latches closed.

Original NASA ASRS Text

Title: AFTER COMPLETING AN ASSIGNED CHECK ON A B757-200 #1 ENGINE; TWO MECHANICS ARE LATER INFORMED OF THRUST REVERSER COWL DAMAGED WHEN ACFT ARRIVED AT A DOWNLINE STATION.

Narrative: I WAS ASSIGNED TO DO A CHK ON #1 ENG OF ACFT X TOGETHER WITH MR XXXXX. AFTER THE JOB CARD WAS ACCOMPLISHED; WE STARTED THE ENG CLOSE-UP. WE MADE SURE EVERY PANEL WAS SECURED AND PROPERLY LATCHED. UPON LNDG IN ZZZ; IT WAS FOUND THAT THE REVERSER WAS DAMAGED DUE TO AN OPEN ACCESS DOOR. IT IS NOT KNOWN IF THE DOOR ACCIDENTALLY OPENED DUE TO LNDG PROC. SUPPLEMENTAL INFO FROM ACN 776590: UPON ARR AT ZZZ; FOUND #1 ENG THRUST REVERSER COWL DAMAGED. CALLBACK CONVERSATION WITH RPTR ACN 776591 REVEALED THE FOLLOWING INFO: REPORTER STATED THAT ONE OF THE TWO LOWER ACCESS PANELS FOR THE FAN DUCT COWL AND THRUST REVERSER COWL LATCHES CAME OPEN AND WAS DAMAGED DURING THRUST REVERSER OPERATION ON LANDING. REPORTER ALSO STATED HIS CARRIER IS AWARE OF SIMILAR PROBLEMS WITH THE LATCHES FOR THE ACCESS PANEL NOT REMAINING SECURED AND LATCHED. HIS COMPANY MAINT ENGINEERING IS CONSIDERING SOME TYPE OF IMPROVEMENT TO KEEP LATCHES CLOSED.

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.

After completing an assigned check on a B757-200 #1 engine; two mechanics are later informed of thrust reverser cowl damaged when aircraft arrived at a downline station.