Pilot lands gear up. Gear warning system inoperative.

Attributes
ACN	447611
Time
Date	199908
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : saw.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Operating Under FAR Part	Part 135
Navigation In Use	ils localizer & glide slope : 21
Flight Phase	landing : roll
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 80 flight time total : 11000 flight time type : 4000
ASRS Report	447611
Person 2
Affiliation	company : air taxi
Function	observation : passenger
Events
Anomaly	aircraft equipment problem : critical ground encounters : gear up landing maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	performance deficiency : inspection performance deficiency : installation performance deficiency : repair
Supplementary
Problem Areas	Maintenance Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

The approach was completely normal with no unusual circumstances or distrs. The only remarkable point was that on running the landing checklist as printed in the panel being the yoke, I held off on the gear because the aircraft was about 7 KTS above vlo with 10 degrees of flaps. Without exception (but one) I check my 3 green lights at about 50 ft, but today I did not. I had a new set of tires put on the aircraft, a couple days before, that had a higher profile than the previous ones. I was at the 50 ft point, concentrating on the pending flair and neglected to doublechk the 3 green lights. No gear warning horn or light sounded and post incident was found to be inoperative due to a previously incorrect installation during a repair. Other than the PF's ego, there were no injuries of any kind sustained. There was 1 passenger on board and we both evacuate/evacuationed to the side of the runway immediately after touchdown.

Original NASA ASRS Text

Title: PLT LANDS GEAR UP. GEAR WARNING SYS INOP.

Narrative: THE APCH WAS COMPLETELY NORMAL WITH NO UNUSUAL CIRCUMSTANCES OR DISTRS. THE ONLY REMARKABLE POINT WAS THAT ON RUNNING THE LNDG CHKLIST AS PRINTED IN THE PANEL BEING THE YOKE, I HELD OFF ON THE GEAR BECAUSE THE ACFT WAS ABOUT 7 KTS ABOVE VLO WITH 10 DEGS OF FLAPS. WITHOUT EXCEPTION (BUT ONE) I CHK MY 3 GREEN LIGHTS AT ABOUT 50 FT, BUT TODAY I DID NOT. I HAD A NEW SET OF TIRES PUT ON THE ACFT, A COUPLE DAYS BEFORE, THAT HAD A HIGHER PROFILE THAN THE PREVIOUS ONES. I WAS AT THE 50 FT POINT, CONCENTRATING ON THE PENDING FLAIR AND NEGLECTED TO DOUBLECHK THE 3 GREEN LIGHTS. NO GEAR WARNING HORN OR LIGHT SOUNDED AND POST INCIDENT WAS FOUND TO BE INOP DUE TO A PREVIOUSLY INCORRECT INSTALLATION DURING A REPAIR. OTHER THAN THE PF'S EGO, THERE WERE NO INJURIES OF ANY KIND SUSTAINED. THERE WAS 1 PAX ON BOARD AND WE BOTH EVACED TO THE SIDE OF THE RWY IMMEDIATELY AFTER TOUCHDOWN.

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.