A B727-200 in cruise declared an emergency and diverted with #1 engine shutdown due to #1 engine pow...

Attributes
ACN	413725
Time
Date	199808
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	413725
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	413724
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On sep/xa/98, aircraft experienced #1 engine throttle stuck at climb power. Inspection revealed that #1 engine thrust reverser directional valve mount bolt fell out and jammed throttle. On aug/xy/98 I replaced the #1 throttle control drum shaft and bearing and crank support bracket per maintenance manual 76-12-41. Per maintenance manual 76-12-41 step east(1) page 205. The drum support bracket that the thrust reverser directional valve was installed on was never removed, and the directional valve was never touched. After the work was performed, aircraft was taken for power assurance run. All checked good. Callback conversation with reporter revealed the following information: the reporter stated the reverser directional control valve has 2 mount bolts secured by lock nuts. The reporter said the maintenance manual states that the directional control valve does not have to be removed to accomplish the throttle mechanism repairs. The reporter stated the 3 mechanics who worked the job did not attempt to remove the valve. The reporter said that some #1 reverser work was done about 30 days prior to the throttle work. The reporter said the work on the throttle mechanism was accomplished almost 1 month before this incident. The reporter stated the FAA has made no contact.

Original NASA ASRS Text

Title: A B727-200 IN CRUISE DECLARED AN EMER AND DIVERTED WITH #1 ENG SHUTDOWN DUE TO #1 ENG PWR LEVER STUCK AT TKOF PWR CAUSED BY A LOOSE REVERSER DIRECTIONAL VALVE MOUNT BOLT JAMMING THE THROTTLE MECHANISM.

Narrative: ON SEP/XA/98, ACFT EXPERIENCED #1 ENG THROTTLE STUCK AT CLB PWR. INSPECTION REVEALED THAT #1 ENG THRUST REVERSER DIRECTIONAL VALVE MOUNT BOLT FELL OUT AND JAMMED THROTTLE. ON AUG/XY/98 I REPLACED THE #1 THROTTLE CTL DRUM SHAFT AND BEARING AND CRANK SUPPORT BRACKET PER MAINT MANUAL 76-12-41. PER MAINT MANUAL 76-12-41 STEP E(1) PAGE 205. THE DRUM SUPPORT BRACKET THAT THE THRUST REVERSER DIRECTIONAL VALVE WAS INSTALLED ON WAS NEVER REMOVED, AND THE DIRECTIONAL VALVE WAS NEVER TOUCHED. AFTER THE WORK WAS PERFORMED, ACFT WAS TAKEN FOR PWR ASSURANCE RUN. ALL CHKED GOOD. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE REVERSER DIRECTIONAL CTL VALVE HAS 2 MOUNT BOLTS SECURED BY LOCK NUTS. THE RPTR SAID THE MAINT MANUAL STATES THAT THE DIRECTIONAL CTL VALVE DOES NOT HAVE TO BE REMOVED TO ACCOMPLISH THE THROTTLE MECHANISM REPAIRS. THE RPTR STATED THE 3 MECHS WHO WORKED THE JOB DID NOT ATTEMPT TO REMOVE THE VALVE. THE RPTR SAID THAT SOME #1 REVERSER WORK WAS DONE ABOUT 30 DAYS PRIOR TO THE THROTTLE WORK. THE RPTR SAID THE WORK ON THE THROTTLE MECHANISM WAS ACCOMPLISHED ALMOST 1 MONTH BEFORE THIS INCIDENT. THE RPTR STATED THE FAA HAS MADE NO CONTACT.

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.

A B727-200 in cruise declared an emergency and diverted with #1 engine shutdown due to #1 engine power lever stuck at takeoff power caused by a loose reverser directional valve mount bolt jamming the throttle mechanism.