PA23 pilot makes gear up landing after hydraulic failure.

Attributes
ACN	711115
Time
Date	200609
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-23 Apache (& Geronimo Apache)
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 25 flight time total : 10000 flight time type : 2000
ASRS Report	711115
Person 2
Affiliation	other
Function	maintenance : inspector
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Aircraft came out of maintenance for cylinder replacement work. Operator had dispute over bill resulting in aircraft inspector not certifying his work. Advised the pilot aircraft 'safe to fly.' after this; aircraft pilot made precautionary landing necessary after hydraulic system malfunctioned. Before the landing; this pilot exhausted repeated attempts emergency procedures in pilot handbook over a 45 min period without success. Callback conversation with reporter revealed the following information: all attempts to lower the landing gear; both normal and emergency; were unsuccessful. Postflt analysis revealed that a hydraulic fitting had been crossthreaded then reattached but not properly tightened. This resulted in a leak which rendered both the normal and emergency gear extension system inoperative.

Original NASA ASRS Text

Title: PA23 PLT MAKES GEAR UP LNDG AFTER HYD FAILURE.

Narrative: ACFT CAME OUT OF MAINT FOR CYLINDER REPLACEMENT WORK. OPERATOR HAD DISPUTE OVER BILL RESULTING IN ACFT INSPECTOR NOT CERTIFYING HIS WORK. ADVISED THE PLT ACFT 'SAFE TO FLY.' AFTER THIS; ACFT PLT MADE PRECAUTIONARY LNDG NECESSARY AFTER HYD SYS MALFUNCTIONED. BEFORE THE LNDG; THIS PLT EXHAUSTED REPEATED ATTEMPTS EMER PROCS IN PLT HANDBOOK OVER A 45 MIN PERIOD WITHOUT SUCCESS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: ALL ATTEMPTS TO LOWER THE LNDG GEAR; BOTH NORMAL AND EMER; WERE UNSUCCESSFUL. POSTFLT ANALYSIS REVEALED THAT A HYD FITTING HAD BEEN CROSSTHREADED THEN REATTACHED BUT NOT PROPERLY TIGHTENED. THIS RESULTED IN A LEAK WHICH RENDERED BOTH THE NORMAL AND EMER GEAR EXTENSION SYS INOP.

Data retrieved from NASA's ASRS site as of January 2009 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.