A B737-400 on overnight check had the trailing edge flap jackscrews ballnut reservoirs lubed per job...

Attributes
ACN	377949
Time
Date	199708
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : msp
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	377949
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Aircraft xyz on aug/aa/97, I accomplished air carrier overnight. Job card #yyyyy, flap transmission jackscrew ballnut reservoirs lubrication. The maintenance I performed was done in accordance with the job card. I then made the required log entry stating same. On aug/hh/97, an abc mechanic made a log entry answering a pilot log report, as follows. 'Found all 8 wing flap jackscrew reservoirs empty -- no oil (note: ZZZ on aug/aa/97 accomplished job card #yyyyy air carrier overnight in mach history). I replenished all 8 reservoirs, ran flaps several cycles -- operational ground check normal.' the pilot log report read as follows: during approach when flaps were selected to 30 degrees, indictor showed 25 degrees/at touchdown indicator went to 30 degrees. Callback conversation with reporter revealed the following information: the reporter stated the reservoirs were lubed per the job card. The reporter said the problem is the design of the reservoir which consists of oil absorbent pads and the level of the reservoir is determined by the rate the oil is absorbed by the pads. The reporter stated the oil is pumped from a service can into the reservoir until it starts to run out the service port indicating the reservoir is full. The reporter said if the pads absorb the oil quickly after servicing and is rechked it could appear the reservoirs were never svced. Reporter stated the mechanic who reserviced the jackscrew reservoirs did not report any leakage or the jackscrews being dry.

Original NASA ASRS Text

Title: A B737-400 ON OVERNIGHT CHK HAD THE TRAILING EDGE FLAP JACKSCREWS BALLNUT RESERVOIRS LUBED PER JOB CARD AND 7 DAYS LATER NEEDED TO BE LUBED AGAIN TO CORRECT A LOGBOOK WRITE-UP.

Narrative: ACFT XYZ ON AUG/AA/97, I ACCOMPLISHED ACR OVERNIGHT. JOB CARD #YYYYY, FLAP XMISSION JACKSCREW BALLNUT RESERVOIRS LUBRICATION. THE MAINT I PERFORMED WAS DONE IN ACCORDANCE WITH THE JOB CARD. I THEN MADE THE REQUIRED LOG ENTRY STATING SAME. ON AUG/HH/97, AN ABC MECH MADE A LOG ENTRY ANSWERING A PLT LOG RPT, AS FOLLOWS. 'FOUND ALL 8 WING FLAP JACKSCREW RESERVOIRS EMPTY -- NO OIL (NOTE: ZZZ ON AUG/AA/97 ACCOMPLISHED JOB CARD #YYYYY ACR OVERNIGHT IN MACH HISTORY). I REPLENISHED ALL 8 RESERVOIRS, RAN FLAPS SEVERAL CYCLES -- OPERATIONAL GND CHK NORMAL.' THE PLT LOG RPT READ AS FOLLOWS: DURING APCH WHEN FLAPS WERE SELECTED TO 30 DEGS, INDICTOR SHOWED 25 DEGS/AT TOUCHDOWN INDICATOR WENT TO 30 DEGS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE RESERVOIRS WERE LUBED PER THE JOB CARD. THE RPTR SAID THE PROB IS THE DESIGN OF THE RESERVOIR WHICH CONSISTS OF OIL ABSORBENT PADS AND THE LEVEL OF THE RESERVOIR IS DETERMINED BY THE RATE THE OIL IS ABSORBED BY THE PADS. THE RPTR STATED THE OIL IS PUMPED FROM A SVC CAN INTO THE RESERVOIR UNTIL IT STARTS TO RUN OUT THE SVC PORT INDICATING THE RESERVOIR IS FULL. THE RPTR SAID IF THE PADS ABSORB THE OIL QUICKLY AFTER SVCING AND IS RECHKED IT COULD APPEAR THE RESERVOIRS WERE NEVER SVCED. RPTR STATED THE MECH WHO RESERVICED THE JACKSCREW RESERVOIRS DID NOT RPT ANY LEAKAGE OR THE JACKSCREWS BEING DRY.

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.

A B737-400 on overnight check had the trailing edge flap jackscrews ballnut reservoirs lubed per job card and 7 days later needed to be lubed again to correct a logbook write-up.