Partial loss of aircraft control, nose wheel shimmy and steering.

Attributes
ACN	297842
Time
Date	199502
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
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	297842
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

As reported by crew log page X: 'as nose gear touched down during landing, excessive nose wheel shimmy was felt and steering itself was almost nil. After aircraft was brought to a stop, 'a' system qty was noted as zero' arrived at work and took turnover of job already in progress reference. Log page Y 'removed nlg l-hand steering actuator and metering valve per maintenance manual 32-51-31 due to leakage. Removed and replaced steering metering valve and l-hand steer-in cylinder in accordance with maintenance manual 32-51-21 and 32- 51-31. Performed adjustment test in accordance with maintenance manual 32-51-0 operations checks good with no leaks noted.' performed job in safe manner aircraft departed on time and safely.

Original NASA ASRS Text

Title: PARTIAL LOSS OF ACFT CTL, NOSE WHEEL SHIMMY AND STEERING.

Narrative: AS RPTED BY CREW LOG PAGE X: 'AS NOSE GEAR TOUCHED DOWN DURING LNDG, EXCESSIVE NOSE WHEEL SHIMMY WAS FELT AND STEERING ITSELF WAS ALMOST NIL. AFTER ACFT WAS BROUGHT TO A STOP, 'A' SYS QTY WAS NOTED AS ZERO' ARRIVED AT WORK AND TOOK TURNOVER OF JOB ALREADY IN PROGRESS REF. LOG PAGE Y 'REMOVED NLG L-HAND STEERING ACTUATOR AND METERING VALVE PER MAINT MANUAL 32-51-31 DUE TO LEAKAGE. REMOVED AND REPLACED STEERING METERING VALVE AND L-HAND STEER-IN CYLINDER IN ACCORDANCE WITH MAINT MANUAL 32-51-21 AND 32- 51-31. PERFORMED ADJUSTMENT TEST IN ACCORDANCE WITH MAINT MANUAL 32-51-0 OPS CHKS GOOD WITH NO LEAKS NOTED.' PERFORMED JOB IN SAFE MANNER ACFT DEPARTED ON TIME AND SAFELY.

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.