Flight crew of an medium large transport overshot descent altitude due to lake of autoplt altitude c...

Attributes
ACN	311720
Time
Date	199507
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : scy airport : dfw
State Reference	TX
Altitude	msl bound lower : 10500 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	311720
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Altitude deviation. Descending to 11000 ft on the arrival over scurry, the autoplt failed to capture the selected altitude. The aircraft descended to approximately 10500 ft after taking manual control. The autoplt had been previously written up for not capturing an altitude and was signed off as 'bite test good.' the fact that it had worked on climb out and cruise lulled us into thinking it was alright. However closer review of the previous write up showed that it had malfunctioned during descent.

Original NASA ASRS Text

Title: FLC OF AN MLG OVERSHOT DSCNT ALT DUE TO LAKE OF AUTOPLT ALT CAPTURE.

Narrative: ALTDEV. DSNDING TO 11000 FT ON THE ARR OVER SCURRY, THE AUTOPLT FAILED TO CAPTURE THE SELECTED ALT. THE ACFT DSNDED TO APPROX 10500 FT AFTER TAKING MANUAL CTL. THE AUTOPLT HAD BEEN PREVIOUSLY WRITTEN UP FOR NOT CAPTURING AN ALT AND WAS SIGNED OFF AS 'BITE TEST GOOD.' THE FACT THAT IT HAD WORKED ON CLBOUT AND CRUISE LULLED US INTO THINKING IT WAS ALRIGHT. HOWEVER CLOSER REVIEW OF THE PREVIOUS WRITE UP SHOWED THAT IT HAD MALFUNCTIONED DURING DSCNT.

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.

Flight crew of an medium large transport overshot descent altitude due to lake of autoplt altitude capture.