Cpr turbojet cleared to descend to 4000 ft. Leaving 5000 ft captain disconnected the autoplt and thought the warning tone was autoplt. Out of 3700 ft he perceived the tone to be altitude alert for 1000 ft to go. Level at 3000 ft controller queried flight as to cleared altitude and reclred to maintain 3000 ft.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	354550
Time
Date	199611
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pns
State Reference	FL
Altitude	msl bound lower : 3000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : pns
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 13000 flight time type : 40
ASRS Report	354550
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : far non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : anomaly accepted other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft cleared to descend to 4000 ft. Passing 5000 ft I disconnected the autoplt. The autoplt disconnect tone is identical with the altitude alert tone. The tone I heard at 5000 ft was perceived by me to be the autoplt disconnect tone. Passing 3700 ft the altitude alert tone sounded which I took to be '1000 ft' above assigned altitude. I was looking for the airport and not looking specifically at altitude in descent. Level at 3000 ft the controller asked our assigned altitude. The alerter was set to 4000 ft. We advised we were assigned 4000 ft. Controller then advised 'maintain 3000 ft.'

Original NASA ASRS Text

Title: CPR TURBOJET CLRED TO DSND TO 4000 FT. LEAVING 5000 FT CAPT DISCONNECTED THE AUTOPLT AND THOUGHT THE WARNING TONE WAS AUTOPLT. OUT OF 3700 FT HE PERCEIVED THE TONE TO BE ALT ALERT FOR 1000 FT TO GO. LEVEL AT 3000 FT CTLR QUERIED FLT AS TO CLRED ALT AND RECLRED TO MAINTAIN 3000 FT.

Narrative: ACFT CLRED TO DSND TO 4000 FT. PASSING 5000 FT I DISCONNECTED THE AUTOPLT. THE AUTOPLT DISCONNECT TONE IS IDENTICAL WITH THE ALT ALERT TONE. THE TONE I HEARD AT 5000 FT WAS PERCEIVED BY ME TO BE THE AUTOPLT DISCONNECT TONE. PASSING 3700 FT THE ALT ALERT TONE SOUNDED WHICH I TOOK TO BE '1000 FT' ABOVE ASSIGNED ALT. I WAS LOOKING FOR THE ARPT AND NOT LOOKING SPECIFICALLY AT ALT IN DSCNT. LEVEL AT 3000 FT THE CTLR ASKED OUR ASSIGNED ALT. THE ALERTER WAS SET TO 4000 FT. WE ADVISED WE WERE ASSIGNED 4000 FT. CTLR THEN ADVISED 'MAINTAIN 3000 FT.'

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.