<< >> NASA ASRS Report 612952, March 2004

A PA28 single pilot lost his alternator during approach to dsm which caused his radio, transponder, and landing gear to malfunction.

Attributes
ACN	612952
Time
Date	200403
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dsm.airport
State Reference	IA
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dsm.tracon tower : dsm.tower
Operator	general aviation : personal
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : level descent : approach landing : go around
Route In Use	approach : traffic pattern
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 8 flight time total : 700 flight time type : 200
ASRS Report	612952
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : landed in emergency condition flight crew : landed as precaution
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

The airplane lost alternator power in cruise flight. I was in touch with des moines approach and requested clearance to des moines. I was cleared to land runway 5 at dsm. On final approach, the radio and transponder failed. The landing gear also failed to extend. I overflew the runway and executed a missed approach. Back at altitude, I extended the landing gear using the emergency gear extension system. I then proceeded back into the pattern, cleared the approach path visually, and landed without incident on runway 5. I proceeded to taxi to the GA ramp to troubleshoot the problem.

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Original NASA ASRS Text

Title: A PA28 SINGLE PLT LOST HIS ALTERNATOR DURING APCH TO DSM WHICH CAUSED HIS RADIO, XPONDER, AND LNDG GEAR TO MALFUNCTION.

Narrative: THE AIRPLANE LOST ALTERNATOR PWR IN CRUISE FLT. I WAS IN TOUCH WITH DES MOINES APCH AND REQUESTED CLRNC TO DES MOINES. I WAS CLRED TO LAND RWY 5 AT DSM. ON FINAL APCH, THE RADIO AND XPONDER FAILED. THE LNDG GEAR ALSO FAILED TO EXTEND. I OVERFLEW THE RWY AND EXECUTED A MISSED APCH. BACK AT ALT, I EXTENDED THE LNDG GEAR USING THE EMER GEAR EXTENSION SYS. I THEN PROCEEDED BACK INTO THE PATTERN, CLRED THE APCH PATH VISUALLY, AND LANDED WITHOUT INCIDENT ON RWY 5. I PROCEEDED TO TAXI TO THE GA RAMP TO TROUBLESHOOT THE PROB.

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.