An aerostar 602P just after takeoff declared an emergency and returned to the field due to the left engine loss of power caused by a disconnected turbo outlet duct.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	433690
Time
Date	199904
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-60 602 Aerostar
Operating Under FAR Part	Part 91
Flight Phase	ground : parked ground : maintenance
Flight Plan	None
Person 1
Affiliation	company other
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 4
ASRS Report	433690
Person 2
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : multi engine
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : left engine indicators other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : inspection performance deficiency : repair performance deficiency : testing
Supplementary
Problem Areas	Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

The customer brought the aircraft to our facility with several squawks, including oil leaks on both engines and a fluctuating manifold pressure problem on the left engine. Subsequent and lengthy maintenance solved all problems. I was assigned to reinstall and secure both turbo outlet ducts, after which the aircraft was released to the customer. Apparently on departure, the left engine lost power, after which the customer (pilot) returned to the airport and landed without incident. Removal of the engine cowl revealed the problem (cause) as the inboard turbo outlet duct 'popped' off from its clamp. A thorough cleaning of the duct and components, removing all traces of oil and a change of retaining clamps solved the problem. Contributing factors: 1) rushing the maintenance with customer distrs. 2) old style ducts used. Newer ducts alleviate this problem (mandatory change of the old style duct south/B warranted required).

Original NASA ASRS Text

Title: AN AEROSTAR 602P JUST AFTER TKOF DECLARED AN EMER AND RETURNED TO THE FIELD DUE TO THE L ENG LOSS OF PWR CAUSED BY A DISCONNECTED TURBO OUTLET DUCT.

Narrative: THE CUSTOMER BROUGHT THE ACFT TO OUR FACILITY WITH SEVERAL SQUAWKS, INCLUDING OIL LEAKS ON BOTH ENGS AND A FLUCTUATING MANIFOLD PRESSURE PROB ON THE L ENG. SUBSEQUENT AND LENGTHY MAINT SOLVED ALL PROBS. I WAS ASSIGNED TO REINSTALL AND SECURE BOTH TURBO OUTLET DUCTS, AFTER WHICH THE ACFT WAS RELEASED TO THE CUSTOMER. APPARENTLY ON DEP, THE L ENG LOST PWR, AFTER WHICH THE CUSTOMER (PLT) RETURNED TO THE ARPT AND LANDED WITHOUT INCIDENT. REMOVAL OF THE ENG COWL REVEALED THE PROB (CAUSE) AS THE INBOARD TURBO OUTLET DUCT 'POPPED' OFF FROM ITS CLAMP. A THOROUGH CLEANING OF THE DUCT AND COMPONENTS, REMOVING ALL TRACES OF OIL AND A CHANGE OF RETAINING CLAMPS SOLVED THE PROB. CONTRIBUTING FACTORS: 1) RUSHING THE MAINT WITH CUSTOMER DISTRS. 2) OLD STYLE DUCTS USED. NEWER DUCTS ALLEVIATE THIS PROB (MANDATORY CHANGE OF THE OLD STYLE DUCT S/B WARRANTED REQUIRED).

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.