<< >> NASA ASRS Report 421727, December 1998

The flight crew of a B727 heard the nose gear shudder during pushback and found that it was due to the steering bypass pin not being installed. No damage was done.

Attributes
ACN	421727
Time
Date	199812
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 10500 flight time type : 3500
ASRS Report	421727
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Upon pushback we heard and felt tow bar shudder. Agent had us set brakes. When we asked about noise, he said tow bar had bent because nose steering bypass pin was not installed per proper procedure. We verified no damage had been done to nose gear.

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Original NASA ASRS Text

Title: THE FLC OF A B727 HEARD THE NOSE GEAR SHUDDER DURING PUSHBACK AND FOUND THAT IT WAS DUE TO THE STEERING BYPASS PIN NOT BEING INSTALLED. NO DAMAGE WAS DONE.

Narrative: UPON PUSHBACK WE HEARD AND FELT TOW BAR SHUDDER. AGENT HAD US SET BRAKES. WHEN WE ASKED ABOUT NOISE, HE SAID TOW BAR HAD BENT BECAUSE NOSE STEERING BYPASS PIN WAS NOT INSTALLED PER PROPER PROC. WE VERIFIED NO DAMAGE HAD BEEN DONE TO NOSE GEAR.

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.