A B747-400 incurred damage to a leading edge flap when extended onto a ladder.

Attributes
ACN	427906
Time
Date	199902
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance ground : parked
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 30
ASRS Report	427906
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Events
Anomaly	aircraft equipment problem : critical ground encounters other maintenance problem : improper maintenance non adherence : company policies non adherence : published procedure
Independent Detector	other other : mech1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : scheduled maintenance performance deficiency : unqualified personnel
Supplementary
Problem Areas	Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Just as I moved a ladder to get to my work area, the riggers ran the leading edge flaps. The ladder jammed under the flap and dented the flap.

Original NASA ASRS Text

Title: A B747-400 INCURRED DAMAGE TO A LEADING EDGE FLAP WHEN EXTENDED ONTO A LADDER.

Narrative: JUST AS I MOVED A LADDER TO GET TO MY WORK AREA, THE RIGGERS RAN THE LEADING EDGE FLAPS. THE LADDER JAMMED UNDER THE FLAP AND DENTED THE FLAP.

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.