While climbing VFR to 15500 MSL; pilot falls asleep. Wakes up at 25500 MSL.

Attributes
ACN	751192
Time
Date	200708
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : zzz.vor
State Reference	US
Altitude	msl single value : 25500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Navigation In Use	other
Flight Phase	climbout : vacating altitude
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 10000 flight time type : 2500
ASRS Report	751192
Events
Anomaly	aircraft equipment problem : less severe airspace violation : entry non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited penetrated airspace
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Inadvertent altitude deviation. PF single pilot; non scheduled operator. I programmed the KLN90B from ZZZ1 to ZZZ and armed the autoplt for 15500 ft. During initial climb; I fell asleep and aircraft did not capture altitude preselect. This has been an issue with the honeywell autoplt and requires monitoring; which of course I was not. I awoke at FL255 and immediately began a descending 90 degree turn to clear class a airspace and continued to ZZZ. A possible contributing factor was our company policy of preprogramming the landing airfield's pressure setting into the pressurization system pre-selector instead of actual altitude climbing to; as per operating handbook due to frequency of short leg flts.

Original NASA ASRS Text

Title: WHILE CLIMBING VFR TO 15500 MSL; PLT FALLS ASLEEP. WAKES UP AT 25500 MSL.

Narrative: INADVERTENT ALTDEV. PF SINGLE PLT; NON SCHEDULED OPERATOR. I PROGRAMMED THE KLN90B FROM ZZZ1 TO ZZZ AND ARMED THE AUTOPLT FOR 15500 FT. DURING INITIAL CLB; I FELL ASLEEP AND ACFT DID NOT CAPTURE ALT PRESELECT. THIS HAS BEEN AN ISSUE WITH THE HONEYWELL AUTOPLT AND REQUIRES MONITORING; WHICH OF COURSE I WAS NOT. I AWOKE AT FL255 AND IMMEDIATELY BEGAN A DSNDING 90 DEG TURN TO CLR CLASS A AIRSPACE AND CONTINUED TO ZZZ. A POSSIBLE CONTRIBUTING FACTOR WAS OUR COMPANY POLICY OF PREPROGRAMMING THE LNDG AIRFIELD'S PRESSURE SETTING INTO THE PRESSURIZATION SYS PRE-SELECTOR INSTEAD OF ACTUAL ALT CLBING TO; AS PER OPERATING HANDBOOK DUE TO FREQUENCY OF SHORT LEG FLTS.

Data retrieved from NASA's ASRS site as of January 2009 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.