 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of a dc-8 aircraft landed with an unsafe main gear light and horn after making various attempts to correct the problem.
| Attributes | |
| ACN | 261449 |
| Time | |
| Date | 199401 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : iln |
| State Reference | OH |
| Altitude | agl bound lower : 0 agl bound upper : 500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : iln |
| Operator | common carrier : air carrier |
| Make Model Name | DC-8 61 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 300 flight time total : 11000 flight time type : 3000 |
| ASRS Report | 261449 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Left main landing gear unsafe light would not go out upon lowering landing gear in kiln. Followed dc-8 aircraft procedure including depressurizing hydraulic system and using alternate gear extension. Fly by kiln tower 'gear appears down.' also tried touchdown on right main to jar something loose. No help. Tried some turns to try to put some air loads on gear to pop into position. Again, no help. Landed kiln with unsafe gear. Came to stop, had ground pin landing gear and towed to ramp. Callback conversation with reporter revealed the following information: reporter stated that the cause of the lack of the left gear down indication was the downlock micro switch covered with ice and slush. The aircraft was a model dc-8-61 and the landing gear unsafe down warning horn sounded even on the ground after installing the landing gear pins.
Original NASA ASRS Text
Title: FLC OF A DC-8 ACFT LANDED WITH AN UNSAFE MAIN GEAR LIGHT AND HORN AFTER MAKING VARIOUS ATTEMPTS TO CORRECT THE PROB.
Narrative: L MAIN LNDG GEAR UNSAFE LIGHT WOULD NOT GO OUT UPON LOWERING LNDG GEAR IN KILN. FOLLOWED DC-8 ACFT PROC INCLUDING DEPRESSURIZING HYD SYS AND USING ALTERNATE GEAR EXTENSION. FLY BY KILN TWR 'GEAR APPEARS DOWN.' ALSO TRIED TOUCHDOWN ON R MAIN TO JAR SOMETHING LOOSE. NO HELP. TRIED SOME TURNS TO TRY TO PUT SOME AIR LOADS ON GEAR TO POP INTO POS. AGAIN, NO HELP. LANDED KILN WITH UNSAFE GEAR. CAME TO STOP, HAD GND PIN LNDG GEAR AND TOWED TO RAMP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THE CAUSE OF THE LACK OF THE L GEAR DOWN INDICATION WAS THE DOWNLOCK MICRO SWITCH COVERED WITH ICE AND SLUSH. THE ACFT WAS A MODEL DC-8-61 AND THE LNDG GEAR UNSAFE DOWN WARNING HORN SOUNDED EVEN ON THE GND AFTER INSTALLING THE LNDG GEAR PINS.
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.