<< >> NASA ASRS Report 417711, October 1998

Gii crew out of vny were instructed to climb to FL190. Captain set the alerter but it failed and the flight overshot the altitude.

Attributes
ACN	417711
Time
Date	199810
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pmd
State Reference	CA
Altitude	msl bound lower : 19000 msl bound upper : 19300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	general aviation : corporate
Make Model Name	Gulfstream II
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 124 flight time total : 18000 flight time type : 850
ASRS Report	417711
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 9200 flight time type : 800
ASRS Report	417490
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On a VFR climb through 16000 ft to maintain FL190, engaged autoplt. Going through approximately 16000 ft, autoplt failed to level off at FL190. Realized this at about FL193. Disengaged autoplt and descended back to FL190. Contributing factors to this problem were fact that I had not flown this particular aircraft before, and had not flown with this copilot before. Had recent experience in model of this aircraft where autoplt and flight director are tied together. Altitude alerter is mounted on center pedestal where it is difficult to see. The aural warning was not working. Corrective action taken was to change procedure for callout of altitude when autoplt is engaged. Other factor might be the fact that I also fly aircraft where altitude mode is automatically engaged when new altitude is selected.

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Original NASA ASRS Text

Title: GII CREW OUT OF VNY WERE INSTRUCTED TO CLB TO FL190. CAPT SET THE ALERTER BUT IT FAILED AND THE FLT OVERSHOT THE ALT.

Narrative: ON A VFR CLB THROUGH 16000 FT TO MAINTAIN FL190, ENGAGED AUTOPLT. GOING THROUGH APPROX 16000 FT, AUTOPLT FAILED TO LEVEL OFF AT FL190. REALIZED THIS AT ABOUT FL193. DISENGAGED AUTOPLT AND DSNDED BACK TO FL190. CONTRIBUTING FACTORS TO THIS PROB WERE FACT THAT I HAD NOT FLOWN THIS PARTICULAR ACFT BEFORE, AND HAD NOT FLOWN WITH THIS COPLT BEFORE. HAD RECENT EXPERIENCE IN MODEL OF THIS ACFT WHERE AUTOPLT AND FLT DIRECTOR ARE TIED TOGETHER. ALT ALERTER IS MOUNTED ON CTR PEDESTAL WHERE IT IS DIFFICULT TO SEE. THE AURAL WARNING WAS NOT WORKING. CORRECTIVE ACTION TAKEN WAS TO CHANGE PROC FOR CALLOUT OF ALT WHEN AUTOPLT IS ENGAGED. OTHER FACTOR MIGHT BE THE FACT THAT I ALSO FLY ACFT WHERE ALT MODE IS AUTOMATICALLY ENGAGED WHEN NEW ALT IS SELECTED.

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.