<< >> NASA ASRS Report 527471, October 2001

MD80 flight crew overshot holding fix altitude during descent due to failure to manually set the altitude alert.

Attributes
ACN	527471
Time
Date	200110
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : ftz.vortac
State Reference	MO
Altitude	msl bound lower : 12700 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : t75.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : holding
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 3500
ASRS Report	527471
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We had an altitude deviation of approximately 300 ft while on a holding pattern near furistel VOR, just west of stl. While descending in the holding pattern the autoplt failed to capture our altitude at 13000 ft. Altitude decreased to 12700 ft when we corrected. The reason for this is company's failure to have the altitude in the altitude alert window automatic arm, instead of pilot manual arm. Fatigue also played a part.

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Original NASA ASRS Text

Title: MD80 FLC OVERSHOT HOLDING FIX ALT DURING DESCENT DUE TO FAILURE TO MANUALLY SET THE ALT ALERT.

Narrative: WE HAD AN ALT DEV OF APPROX 300 FT WHILE ON A HOLDING PATTERN NEAR FURISTEL VOR, JUST WEST OF STL. WHILE DESCENDING IN THE HOLDING PATTERN THE AUTOPLT FAILED TO CAPTURE OUR ALT AT 13000 FT. ALT DECREASED TO 12700 FT WHEN WE CORRECTED. THE REASON FOR THIS IS COMPANY'S FAILURE TO HAVE THE ALT IN THE ALT ALERT WINDOW AUTO ARM, INSTEAD OF PLT MANUAL ARM. FATIGUE ALSO PLAYED A PART.

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.