Narrative:

Crew was unable to select landing gear down due to jammed landing gear handle. Crew made missed approach followed by delaying vectors to troubleshoot event. Gear was extended via the alternate method. At that time, the stuck handle became free and was selected to the down position. Aircraft landed normally, though without nosewheel steering and with gear doors open and dragging due to hydraulic design of alternate gear system. The aircraft was towed from the runway to the gate. I have no idea why the handle jammed although I heard that this is common lately with the F100. There were no injuries and all normal and emergency checklists were complied with. Callback conversation with reporter revealed the following information: reporter added that he has had to extend the landing gear on the fokker 100 before, but with a loss of hydraulics. In those cases with a hydraulic system loss, the landing gear settles down on the gear doors and the gear extends as soon as the emergency handle is pulled. It took so long for this gear to free fall that the crew was planning on a diversion to bos. He wrote a letter to his equipment manager asking him if that length of time was normal. No reply as yet on the aircraft problem except that the manager thought the time was not normal. Reporter will advise this office if information is received. Being that this situation may not be normal the air carrier wants to check out the aircraft to see if anything else might be abnormal in the system. The reporter said that there have been 3 incidents of this nature, but his was the only 'long timer.' the temperature was very cold. The air carrier has had problems with the fact that the teleflex cables on the emergency system cannot be lubricated. Fokker says that is ok, they are perfectly alright. If the situation is normal then the reporter wants other crews to get the message.

Google
 

Original NASA ASRS Text

Title: A FOKKER 100 GEAR HANDLE IS STUCK IN THE GEAR UP POS ON APCH TO PWM. CREW USES THE EMER GEAR LOWERING PROC TO EXTEND THE GEAR. IT TOOK AN UNUSUALLY LONG TIME FOR THE GEAR TO DROP FREE.

Narrative: CREW WAS UNABLE TO SELECT LNDG GEAR DOWN DUE TO JAMMED LNDG GEAR HANDLE. CREW MADE MISSED APCH FOLLOWED BY DELAYING VECTORS TO TROUBLESHOOT EVENT. GEAR WAS EXTENDED VIA THE ALTERNATE METHOD. AT THAT TIME, THE STUCK HANDLE BECAME FREE AND WAS SELECTED TO THE DOWN POS. ACFT LANDED NORMALLY, THOUGH WITHOUT NOSEWHEEL STEERING AND WITH GEAR DOORS OPEN AND DRAGGING DUE TO HYD DESIGN OF ALTERNATE GEAR SYS. THE ACFT WAS TOWED FROM THE RWY TO THE GATE. I HAVE NO IDEA WHY THE HANDLE JAMMED ALTHOUGH I HEARD THAT THIS IS COMMON LATELY WITH THE F100. THERE WERE NO INJURIES AND ALL NORMAL AND EMER CHKLISTS WERE COMPLIED WITH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR ADDED THAT HE HAS HAD TO EXTEND THE LNDG GEAR ON THE FOKKER 100 BEFORE, BUT WITH A LOSS OF HYDS. IN THOSE CASES WITH A HYD SYS LOSS, THE LNDG GEAR SETTLES DOWN ON THE GEAR DOORS AND THE GEAR EXTENDS AS SOON AS THE EMER HANDLE IS PULLED. IT TOOK SO LONG FOR THIS GEAR TO FREE FALL THAT THE CREW WAS PLANNING ON A DIVERSION TO BOS. HE WROTE A LETTER TO HIS EQUIP MGR ASKING HIM IF THAT LENGTH OF TIME WAS NORMAL. NO REPLY AS YET ON THE ACFT PROB EXCEPT THAT THE MGR THOUGHT THE TIME WAS NOT NORMAL. RPTR WILL ADVISE THIS OFFICE IF INFO IS RECEIVED. BEING THAT THIS SIT MAY NOT BE NORMAL THE ACR WANTS TO CHK OUT THE ACFT TO SEE IF ANYTHING ELSE MIGHT BE ABNORMAL IN THE SYS. THE RPTR SAID THAT THERE HAVE BEEN 3 INCIDENTS OF THIS NATURE, BUT HIS WAS THE ONLY 'LONG TIMER.' THE TEMP WAS VERY COLD. THE ACR HAS HAD PROBS WITH THE FACT THAT THE TELEFLEX CABLES ON THE EMER SYS CANNOT BE LUBRICATED. FOKKER SAYS THAT IS OK, THEY ARE PERFECTLY ALRIGHT. IF THE SIT IS NORMAL THEN THE RPTR WANTS OTHER CREWS TO GET THE MESSAGE.

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.