A remote control overhead crane attached to the stabilizer of a B737-400 moved uncommanded.

Attributes
ACN	666461
Time
Date	200507
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : inspector
ASRS Report	666461
Events
Anomaly	maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Factors
Maintenance	contributing factor : tooling performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance
Supplementary
Problem Areas	Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Working aircraft; r-hand stabilizer hinge bolt inspection. Attached stabilizer sling. Used remote control to take weight off stabilizer. Removed center section hinge pin. Set remote control down on console of SB60 boom lift. Lowered boom lift to floor. Got out of basket and started walking toward inspection office. Noticed aircraft moving. Saw crane traveling east by itself. Ran back and grabbed remote and threw it to floor. Crane stopped.

Original NASA ASRS Text

Title: A REMOTE CTL OVERHEAD CRANE ATTACHED TO THE STABILIZER OF A B737-400 MOVED UNCOMMANDED.

Narrative: WORKING ACFT; R-HAND STABILIZER HINGE BOLT INSPECTION. ATTACHED STABILIZER SLING. USED REMOTE CTL TO TAKE WT OFF STABILIZER. REMOVED CTR SECTION HINGE PIN. SET REMOTE CTL DOWN ON CONSOLE OF SB60 BOOM LIFT. LOWERED BOOM LIFT TO FLOOR. GOT OUT OF BASKET AND STARTED WALKING TOWARD INSPECTION OFFICE. NOTICED ACFT MOVING. SAW CRANE TRAVELING E BY ITSELF. RAN BACK AND GRABBED REMOTE AND THREW IT TO FLOOR. CRANE STOPPED.

Data retrieved from NASA's ASRS site as of January 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.