Altitude overshoot on descent.

Attributes
ACN	278640
Time
Date	199407
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cmk airport : lga
State Reference	NY
Altitude	msl bound lower : 10600 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : geg
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	descent other
Route In Use	arrival other enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 4000
ASRS Report	278640
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZBW gave us a descent clearance from 13000 ft MSL to 11000 ft MSL. We were approximately 30 NM northwest of cmk VOR. Both pilots became distracted while trouble-shooting a warning flag on the LORAN-C and passed through 11000 ft MSL and arrested the altitude bust at 10600 ft MSL. We promptly climbed back to 11000 ft MSL and leveled off. A short time later, ZBW called us but then declined to ask a question. We surmise that the controller's altitude switch alerted our transgression but before he noticed it we were on our cleared altitude. We need to pay attention to our flying and properly divide trouble-shooting jobs between the pilots at the proper times.

Original NASA ASRS Text

Title: ALT OVERSHOOT ON DSCNT.

Narrative: ZBW GAVE US A DSCNT CLRNC FROM 13000 FT MSL TO 11000 FT MSL. WE WERE APPROX 30 NM NW OF CMK VOR. BOTH PLTS BECAME DISTRACTED WHILE TROUBLE-SHOOTING A WARNING FLAG ON THE LORAN-C AND PASSED THROUGH 11000 FT MSL AND ARRESTED THE ALT BUST AT 10600 FT MSL. WE PROMPTLY CLBED BACK TO 11000 FT MSL AND LEVELED OFF. A SHORT TIME LATER, ZBW CALLED US BUT THEN DECLINED TO ASK A QUESTION. WE SURMISE THAT THE CTLR'S ALT SWITCH ALERTED OUR TRANSGRESSION BUT BEFORE HE NOTICED IT WE WERE ON OUR CLRED ALT. WE NEED TO PAY ATTN TO OUR FLYING AND PROPERLY DIVIDE TROUBLE-SHOOTING JOBS BTWN THE PLTS AT THE PROPER TIMES.

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.