<< >> NASA ASRS Report 452302, October 1999

A B727-200 with a deferred yaw damper ground test inoperative was given speed and altitude restrs by the dispatcher that did not apply to the deferred item.

Attributes
ACN	452302
Time
Date	199910
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11000 flight time type : 600
ASRS Report	452302
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 250 flight time total : 3000 flight time type : 1000
ASRS Report	452841
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : yaw damper indicator other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : repair
Supplementary
Problem Areas	Company Maintenance Human Performance Aircraft
Primary Problem	Company

Narrative:

Flew same aircraft for 3 legs. Had an MEL for yaw damper ground test circuit. Procedure for this item said to test yaw damper during taxi. If one or both yaw dampers inoperative, observe inoperative performance limitations. Third item in procedures directed you to limitation correction section. Tested yaw dampers per MEL each leg. Both yaw dampers operated normally each leg. On third leg, a new dispatched limited our altitude and airspeed I called the dispatcher and asked why. He stated that we must take the corrections. I told him that both yaw dampers were operative and that as a crew we had interpreted the MEL as requiring no corrections. He stated that he felt we were wrong, and that the MEL expert worked day shift only, we were to take the correction even though we had not applied them on our first leg, and the flight plan did not call for them to be taken.

Related reports:

• A saab 340 deicer boot timer light was deferred as inoperati...
• A dispatcher reports airbus 300 MEL on yaw damper deferred i...
• Dispatcher report regarding deferred MEL item, flight idle g...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: A B727-200 WITH A DEFERRED YAW DAMPER GND TEST INOP WAS GIVEN SPD AND ALT RESTRS BY THE DISPATCHER THAT DID NOT APPLY TO THE DEFERRED ITEM.

Narrative: FLEW SAME ACFT FOR 3 LEGS. HAD AN MEL FOR YAW DAMPER GND TEST CIRCUIT. PROC FOR THIS ITEM SAID TO TEST YAW DAMPER DURING TAXI. IF ONE OR BOTH YAW DAMPERS INOP, OBSERVE INOP PERFORMANCE LIMITATIONS. THIRD ITEM IN PROCS DIRECTED YOU TO LIMITATION CORRECTION SECTION. TESTED YAW DAMPERS PER MEL EACH LEG. BOTH YAW DAMPERS OPERATED NORMALLY EACH LEG. ON THIRD LEG, A NEW DISPATCHED LIMITED OUR ALT AND AIRSPD I CALLED THE DISPATCHER AND ASKED WHY. HE STATED THAT WE MUST TAKE THE CORRECTIONS. I TOLD HIM THAT BOTH YAW DAMPERS WERE OPERATIVE AND THAT AS A CREW WE HAD INTERPED THE MEL AS REQUIRING NO CORRECTIONS. HE STATED THAT HE FELT WE WERE WRONG, AND THAT THE MEL EXPERT WORKED DAY SHIFT ONLY, WE WERE TO TAKE THE CORRECTION EVEN THOUGH WE HAD NOT APPLIED THEM ON OUR FIRST LEG, AND THE FLT PLAN DID NOT CALL FOR THEM TO BE TAKEN.

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.