Because of a mechanical problem, a DC10 diverts to bos. In descent, an altitude is busted.

Attributes
ACN	418910
Time
Date	199810
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bos
State Reference	MA
Altitude	msl bound lower : 9500 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : bos tower : gmu
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 15000 flight time type : 3000
ASRS Report	418910
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	flight crew : overcame equipment problem none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

DC10 autoplt failed en route to lew, divert to bos. After fuel dump was completed, I was distraction, causing premature descent from 10000 ft to approximately 9500 ft.

Original NASA ASRS Text

Title: BECAUSE OF A MECHANICAL PROB, A DC10 DIVERTS TO BOS. IN DSCNT, AN ALT IS BUSTED.

Narrative: DC10 AUTOPLT FAILED ENRTE TO LEW, DIVERT TO BOS. AFTER FUEL DUMP WAS COMPLETED, I WAS DISTR, CAUSING PREMATURE DSCNT FROM 10000 FT TO APPROX 9500 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.