Altitude deviation. Light transport without altitude alert system.

Attributes
ACN	137666
Time
Date	199002
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : psc
State Reference	WA
Altitude	msl bound lower : 8000 msl bound upper : 9700
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : psc
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute airway : psc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 3840 flight time type : 1300
ASRS Report	137666
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : far non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

While on tri city's departure we were cleared to 8000 to expect 16000 5 min after departure but exceeded this altitude by 1700' and we were not equipped with an altitude alerter. The altitude alerters for our aircraft were taken out because didn't want to maintain them. We weren't notified by any ATC facility of our deviation from our clearance. We quickly descended back to 8000 and then were handed off to sea center. There was no conflict with any other aircraft. Comment: I think it is in the interest of safety to require altitude alerters for commuter airlines who may change altitude more than 4 times in one leg.

Original NASA ASRS Text

Title: ALT DEVIATION. LTT WITHOUT ALT ALERT SYSTEM.

Narrative: WHILE ON TRI CITY'S DEP WE WERE CLRED TO 8000 TO EXPECT 16000 5 MIN AFTER DEP BUT EXCEEDED THIS ALT BY 1700' AND WE WERE NOT EQUIPPED WITH AN ALT ALERTER. THE ALT ALERTERS FOR OUR ACFT WERE TAKEN OUT BECAUSE DIDN'T WANT TO MAINTAIN THEM. WE WEREN'T NOTIFIED BY ANY ATC FAC OF OUR DEVIATION FROM OUR CLRNC. WE QUICKLY DESCENDED BACK TO 8000 AND THEN WERE HANDED OFF TO SEA CENTER. THERE WAS NO CONFLICT WITH ANY OTHER ACFT. COMMENT: I THINK IT IS IN THE INTEREST OF SAFETY TO REQUIRE ALT ALERTERS FOR COMMUTER AIRLINES WHO MAY CHANGE ALT MORE THAN 4 TIMES IN ONE LEG.

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.