Aircraft equipment problem. Hydraulic leak in nosewheel steering actuator.

Attributes
ACN	303838
Time
Date	199504
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fnt
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Controlling Facilities	tower : ord
Operator	common carrier : air carrier
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 135
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	303838
Events
Anomaly	aircraft equipment problem : less severe conflict : airborne less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On apr/fri/95, aircraft landed in fnt from dtw after maintenance was performed on the nosewheel steering. On postflt inspection the crew noted hydraulic fluid on the actuator. Outstation maintenance noted that the bleeders on the actuator (steering) were leaking. He tightened the bleeders and released the aircraft. The actuator was replaced on the morning of apr/thu/95. That morning I bled the actuator in accordance with the dash 8 maintenance manual. The actuator was leak checked and there were no leaks noted by another mechanic. We had a problem with the actuator functional check was no good on apr/thu/95. The next day the teller stops were adjusted and the functional check was good that was 25 hours after I bled the actuator and then was no leaks noted. The only thing that could have been done differently was that all the operations checks were done with the aircraft on the jacks. The aircraft could have a different affect when the aircraft is on the ground but all the checks are called out with the aircraft off the ground.

Original NASA ASRS Text

Title: ACFT EQUIP PROB. HYD LEAK IN NOSEWHEEL STEERING ACTUATOR.

Narrative: ON APR/FRI/95, ACFT LANDED IN FNT FROM DTW AFTER MAINT WAS PERFORMED ON THE NOSEWHEEL STEERING. ON POSTFLT INSPECTION THE CREW NOTED HYD FLUID ON THE ACTUATOR. OUTSTATION MAINT NOTED THAT THE BLEEDERS ON THE ACTUATOR (STEERING) WERE LEAKING. HE TIGHTENED THE BLEEDERS AND RELEASED THE ACFT. THE ACTUATOR WAS REPLACED ON THE MORNING OF APR/THU/95. THAT MORNING I BLED THE ACTUATOR IN ACCORDANCE WITH THE DASH 8 MAINT MANUAL. THE ACTUATOR WAS LEAK CHKED AND THERE WERE NO LEAKS NOTED BY ANOTHER MECH. WE HAD A PROB WITH THE ACTUATOR FUNCTIONAL CHK WAS NO GOOD ON APR/THU/95. THE NEXT DAY THE TELLER STOPS WERE ADJUSTED AND THE FUNCTIONAL CHK WAS GOOD THAT WAS 25 HRS AFTER I BLED THE ACTUATOR AND THEN WAS NO LEAKS NOTED. THE ONLY THING THAT COULD HAVE BEEN DONE DIFFERENTLY WAS THAT ALL THE OPS CHKS WERE DONE WITH THE ACFT ON THE JACKS. THE ACFT COULD HAVE A DIFFERENT AFFECT WHEN THE ACFT IS ON THE GND BUT ALL THE CHKS ARE CALLED OUT WITH THE ACFT OFF THE GND.

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.