Altitude deviation altitude excursion. Flight crew sets the new altitude in the alerter then adjusts the cruise altitude by use of the vertical speed mode and climbs above the assigned altitude.

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Attributes
ACN	301273
Time
Date	199504
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : flm
State Reference	KY
Altitude	msl bound lower : 16000 msl bound upper : 16900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	oversight : pic
Qualification	pilot : commercial pilot : atp
Experience	flight time last 90 days : 275 flight time total : 7000 flight time type : 3500
ASRS Report	301273
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : instrument
Experience	flight time last 90 days : 270 flight time total : 3400 flight time type : 1200
ASRS Report	300748
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flying inbound to flm VOR at 16000 ft. ZID gave us pilot's discretion to 11000 ft. At the same time they gave us a lower altimeter setting. The first officer was flying and he reset his altimeter and used the autoplt vertical mode to ascend again to 16000 ft exactly. Prior to this the altitude preselect was set to 11000 ft for pilot's discretion. We were approximately 50-60 ft low prior to resetting altimeters. The altitude alerter did not chime as we passed through 16000 ft ascending. (Maybe we didn't hear it.) we realized what had happened as we were climbing through 16800 ft. We immediately started our descent back to 16000 ft. Center called and asked us to verify our altitude and I told them we were descending through 16200 ft. I believe crew fatigue contributed to this altitude deviation. It was our last leg on a 2 day trip, the 5TH leg of the day. It was my 6TH day in a row, I had flown about 30 in 7. I believe my first officer was tired although he didn't indicate this to me.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION. FLC SETS THE NEW ALT IN THE ALERTER THEN ADJUSTS THE CRUISE ALT BY USE OF THE VERT SPD MODE AND CLBS ABOVE THE ASSIGNED ALT.

Narrative: FLYING INBOUND TO FLM VOR AT 16000 FT. ZID GAVE US PLT'S DISCRETION TO 11000 FT. AT THE SAME TIME THEY GAVE US A LOWER ALTIMETER SETTING. THE FO WAS FLYING AND HE RESET HIS ALTIMETER AND USED THE AUTOPLT VERT MODE TO ASCEND AGAIN TO 16000 FT EXACTLY. PRIOR TO THIS THE ALT PRESELECT WAS SET TO 11000 FT FOR PLT'S DISCRETION. WE WERE APPROX 50-60 FT LOW PRIOR TO RESETTING ALTIMETERS. THE ALT ALERTER DID NOT CHIME AS WE PASSED THROUGH 16000 FT ASCENDING. (MAYBE WE DIDN'T HEAR IT.) WE REALIZED WHAT HAD HAPPENED AS WE WERE CLBING THROUGH 16800 FT. WE IMMEDIATELY STARTED OUR DSCNT BACK TO 16000 FT. CTR CALLED AND ASKED US TO VERIFY OUR ALT AND I TOLD THEM WE WERE DSNDING THROUGH 16200 FT. I BELIEVE CREW FATIGUE CONTRIBUTED TO THIS ALTDEV. IT WAS OUR LAST LEG ON A 2 DAY TRIP, THE 5TH LEG OF THE DAY. IT WAS MY 6TH DAY IN A ROW, I HAD FLOWN ABOUT 30 IN 7. I BELIEVE MY FO WAS TIRED ALTHOUGH HE DIDN'T INDICATE THIS TO ME.

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.