<< >> NASA ASRS Report 481520, August 2000

A TBM700 cpr pilot climbs above his assigned altitude when the altitude capture feature on his aircraft fails to level at FL290 over mfd, oh.

Attributes
ACN	481520
Time
Date	200008
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mfd.airport
State Reference	OH
Altitude	msl bound lower : 29000 msl bound upper : 29400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	general aviation : corporate
Make Model Name	TBM 700
Operating Under FAR Part	Part 91
Flight Phase	climbout : vacating altitude climbout other cruise : level
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 0.8726 flight time type : 1200
ASRS Report	481520
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft was climbing on autoplt to assigned altitude of 29000 ft with altitude preselect set for 29000 ft. I was alone in aircraft. I heard altitude alerter ding and say I was at 29400 ft and climbing. As I pushed over ZOB asked my altitude. I told him 29400 ft and correcting. There was no further comment from center other than to maintain 29000 ft. The problem was my lack of attention and trust in the autoplt. I must have bumped the preselect off, or not set it as I thought. I know better but just had a lack of attention at altitude leveloff.

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Original NASA ASRS Text

Title: A TBM700 CPR PLT CLBS ABOVE HIS ASSIGNED ALT WHEN THE ALT CAPTURE FEATURE ON HIS ACFT FAILS TO LEVEL AT FL290 OVER MFD, OH.

Narrative: ACFT WAS CLBING ON AUTOPLT TO ASSIGNED ALT OF 29000 FT WITH ALT PRESELECT SET FOR 29000 FT. I WAS ALONE IN ACFT. I HEARD ALT ALERTER DING AND SAY I WAS AT 29400 FT AND CLBING. AS I PUSHED OVER ZOB ASKED MY ALT. I TOLD HIM 29400 FT AND CORRECTING. THERE WAS NO FURTHER COMMENT FROM CTR OTHER THAN TO MAINTAIN 29000 FT. THE PROB WAS MY LACK OF ATTN AND TRUST IN THE AUTOPLT. I MUST HAVE BUMPED THE PRESELECT OFF, OR NOT SET IT AS I THOUGHT. I KNOW BETTER BUT JUST HAD A LACK OF ATTN AT ALT LEVELOFF.

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.