<< >> NASA ASRS Report 248429, August 1993

Pilot of an small aircraft sel private aircraft requested an ATC assistance after failure of the aircraft's attitude indicator and the alternator during an 'on-top' flight.

Attributes
ACN	248429
Time
Date	199308
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mke
State Reference	WI
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mke
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 40 flight time total : 400 flight time type : 400
ASRS Report	248429
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : provided flight assist other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Attitude indicator was a mechanical (rotor) failure. Alternator failure was a mechanical (sealed bearing) failure. Neither are inspected or are annual svcable items. I was attempting to maintain VFR on top with the altitude failure and proceed to VFR landing conditions when the alternator system failed. Emergency was not declared, only immediate assistance from approach. System failures were reported to ATC. Altimeter and static check was not current to accept an IFR clearance. Localizer approach was accepted and used to land as soon as practical.

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Original NASA ASRS Text

Title: PLT OF AN SMA SEL PVT ACFT REQUESTED AN ATC ASSISTANCE AFTER FAILURE OF THE ACFT'S ATTITUDE INDICATOR AND THE ALTERNATOR DURING AN 'ON-TOP' FLT.

Narrative: ATTITUDE INDICATOR WAS A MECHANICAL (ROTOR) FAILURE. ALTERNATOR FAILURE WAS A MECHANICAL (SEALED BEARING) FAILURE. NEITHER ARE INSPECTED OR ARE ANNUAL SVCABLE ITEMS. I WAS ATTEMPTING TO MAINTAIN VFR ON TOP WITH THE ALT FAILURE AND PROCEED TO VFR LNDG CONDITIONS WHEN THE ALTERNATOR SYS FAILED. EMER WAS NOT DECLARED, ONLY IMMEDIATE ASSISTANCE FROM APCH. SYS FAILURES WERE RPTED TO ATC. ALTIMETER AND STATIC CHK WAS NOT CURRENT TO ACCEPT AN IFR CLRNC. LOC APCH WAS ACCEPTED AND USED TO LAND AS SOON AS PRACTICAL.

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.