PA31 pilot ignored oxygen use requirements above 10000 ft, ignored sterile cockpit procedures below 10000 ft, allowed altimeter setting procedures to distract him, and had an altitude overshoot in sux class east.

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Attributes
ACN	596546
Time
Date	200310
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : vmr.ndb
State Reference	SD
Altitude	msl bound lower : 5750 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : fsd.tracon
Operator	general aviation : corporate
Make Model Name	PA-31 Navajo Chieftan/Mojave/Navajo T1020
Operating Under FAR Part	Part 91
Flight Phase	cruise : level cruise : enroute altitude change descent : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 4500 flight time type : 350
ASRS Report	596546
Person 2
Affiliation	other
Function	observation : passenger
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : far non adherence : clearance non adherence : company policies non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : altitude indicator other flight crewa
Resolutory Action	controller : issued new clearance flight crew : returned to assigned altitude flight crew : became reoriented
Supplementary
Problem Areas	Flight Crew Human Performance Environmental Factor Company
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

It was during a slow descent (200-300 FPM) from 12000 ft to 6000 ft (the assigned altitude at pilot's discretion by ATC) on an IFR flight, that I busted the assigned 6000 ft altitude. I was engaged in a conversation with my passenger that I failed to recognize passing through my altitude of 6000 ft, at 5750 ft (250 ft) below my altitude. The other problem was that I reset my altimeter closer to my destination rather than using (sux) sioux city approach's altimeter at the time. I recall my destination's altimeter (ykn's WX)was about (.1

Original NASA ASRS Text

Title: PA31 PLT IGNORED OXYGEN USE REQUIREMENTS ABOVE 10000 FT, IGNORED STERILE COCKPIT PROCS BELOW 10000 FT, ALLOWED ALTIMETER SETTING PROCS TO DISTRACT HIM, AND HAD AN ALT OVERSHOOT IN SUX CLASS E.

Narrative: IT WAS DURING A SLOW DSCNT (200-300 FPM) FROM 12000 FT TO 6000 FT (THE ASSIGNED ALT AT PLT'S DISCRETION BY ATC) ON AN IFR FLT, THAT I BUSTED THE ASSIGNED 6000 FT ALT. I WAS ENGAGED IN A CONVERSATION WITH MY PAX THAT I FAILED TO RECOGNIZE PASSING THROUGH MY ALT OF 6000 FT, AT 5750 FT (250 FT) BELOW MY ALT. THE OTHER PROB WAS THAT I RESET MY ALTIMETER CLOSER TO MY DEST RATHER THAN USING (SUX) SIOUX CITY APCH'S ALTIMETER AT THE TIME. I RECALL MY DEST'S ALTIMETER (YKN'S WX)WAS ABOUT (.1

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.