<< >> NASA ASRS Report 408020, July 1998

Captain, flying, overshot GS altitude during a visual approach due to the lack of autoplt altitude capture. He noticed his mistake and climbed back as approach controller also questioned his altitude. The first officer had set in the missed approach altitude too early, causing the autoplt capture to be ineffective.

Attributes
ACN	408020
Time
Date	199807
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mco
State Reference	FL
Altitude	msl bound lower : 1100 msl bound upper : 1400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mco
Operator	common carrier : air carrier
Make Model Name	Challenger CL604
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 240 flight time total : 10000 flight time type : 3000
ASRS Report	408020
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I set 1400 ft in altitude alerter, while I was glancing down, first officer saw and 'called' the airport in sight. He then set 2000 ft for the missed approach in the altitude alerter. At that time aircraft was approaching 1400 ft and passed through that altitude without capturing. I caught us 300 ft low (below GS) and was climbing back up when approach queried us as to our altitude. Lesson learned by first officer and myself: always communicate what you are doing for CRM purposes and to avoid low altitude.

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Original NASA ASRS Text

Title: CAPT, FLYING, OVERSHOT GS ALT DURING A VISUAL APCH DUE TO THE LACK OF AUTOPLT ALT CAPTURE. HE NOTICED HIS MISTAKE AND CLBED BACK AS APCH CTLR ALSO QUESTIONED HIS ALT. THE FO HAD SET IN THE MISSED APCH ALT TOO EARLY, CAUSING THE AUTOPLT CAPTURE TO BE INEFFECTIVE.

Narrative: I SET 1400 FT IN ALT ALERTER, WHILE I WAS GLANCING DOWN, FO SAW AND 'CALLED' THE ARPT IN SIGHT. HE THEN SET 2000 FT FOR THE MISSED APCH IN THE ALT ALERTER. AT THAT TIME ACFT WAS APCHING 1400 FT AND PASSED THROUGH THAT ALT WITHOUT CAPTURING. I CAUGHT US 300 FT LOW (BELOW GS) AND WAS CLBING BACK UP WHEN APCH QUERIED US AS TO OUR ALT. LESSON LEARNED BY FO AND MYSELF: ALWAYS COMMUNICATE WHAT YOU ARE DOING FOR CRM PURPOSES AND TO AVOID LOW ALT.

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.