<< >> NASA ASRS Report 568597, December 2002

A B737-800 incurred damage to the #1 engine fan reverser cowling and #3 leading edge slat when leading edge devices were inadvertently lowered on the open engine cowl.

Attributes
ACN	568597
Time
Date	200212
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mdw.tower
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : lead technician
Qualification	technician : airframe technician : powerplant
ASRS Report	568597
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
ASRS Report	568583
Events
Anomaly	aircraft equipment problem : critical ground encounters other maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : person 1
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Factors
Maintenance	performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

I assigned technician X to change the #3 slat actuator on aircraft X. They returned later and told me they could not get the air driven hydraulic pump to work. I gave them permission to use the aircraft hydraulic system. I later heard a loud cracking noise and yelled to shut off the hydraulic pumps.

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Original NASA ASRS Text

Title: A B737-800 INCURRED DAMAGE TO THE #1 ENG FAN REVERSER COWLING AND #3 LEADING EDGE SLAT WHEN LEADING EDGE DEVICES WERE INADVERTENTLY LOWERED ON THE OPEN ENG COWL.

Narrative: I ASSIGNED TECHNICIAN X TO CHANGE THE #3 SLAT ACTUATOR ON ACFT X. THEY RETURNED LATER AND TOLD ME THEY COULD NOT GET THE AIR DRIVEN HYD PUMP TO WORK. I GAVE THEM PERMISSION TO USE THE ACFT HYD SYS. I LATER HEARD A LOUD CRACKING NOISE AND YELLED TO SHUT OFF THE HYD PUMPS.

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.