<< >> NASA ASRS Report 480930, July 2000

Altitude overshoot.

Attributes
ACN	480930
Time
Date	200007
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ont.airport
State Reference	CA
Altitude	msl bound lower : 9700 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival : on vectors
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 : 60 flight time total : 9000 flight time type : 1500
ASRS Report	480930
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 215 flight time total : 10000 flight time type : 1400
ASRS Report	480848
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	aircraft equipment : altitude alert other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During arrival to ont on the evening of jul/xa/00, air carrier X flight xyz was given a vector to the south and a descent from 12000 ft to 10000 ft MSL. The crew completed the approach checklist and radio set-up and descended through 10000 ft to approximately 9700 ft. Upon recognizing the error, they immediately climbed to 10000 ft, at which time the approach controller cleared flight xyz to 6000 ft. Neither the crew nor the controller made any reference to the altitude deviation throughout the remainder of the flight.

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Original NASA ASRS Text

Title: ALT OVERSHOOT.

Narrative: DURING ARR TO ONT ON THE EVENING OF JUL/XA/00, ACR X FLT XYZ WAS GIVEN A VECTOR TO THE S AND A DSCNT FROM 12000 FT TO 10000 FT MSL. THE CREW COMPLETED THE APCH CHKLIST AND RADIO SET-UP AND DSNDED THROUGH 10000 FT TO APPROX 9700 FT. UPON RECOGNIZING THE ERROR, THEY IMMEDIATELY CLBED TO 10000 FT, AT WHICH TIME THE APCH CTLR CLRED FLT XYZ TO 6000 FT. NEITHER THE CREW NOR THE CTLR MADE ANY REF TO THE ALTDEV THROUGHOUT THE REMAINDER OF THE FLT.

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.