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Flight crew of B772 experience loud banging in belly of airplane upon gear extension. After landing learn cargo containers in forward compartment are not secure and were damaged.
| Attributes | |
| ACN | 596397 |
| Time | |
| Date | 200310 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sct.tracon |
| State Reference | CA |
| Altitude | msl single value : 2700 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 596397 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : landed as precaution |
| Consequence | other other other |
| Factors | |
| Maintenance | performance deficiency : repair |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
On approach, put gear down at approximately 3500 ft and had flaps 20 degrees extended. Everything at this point was normal. At approximately 2700 ft the first officer and I heard several loud thumps. We quickly checked engine instruments and gear synoptic. All looked normal. Several more thumps were heard and the cabin interphone started ringing. First officer tried to answer the calls but the flight attendant continually called and interphone did not reset, so we were not able to make contact. Since all indications seemed normal at 1000 ft and 500 ft we decided to ignore thumps and interphone rings and just land. On arrival we called maintenance to report possible damage in forward cargo pit. At this time we know of 3 containers that were damaged. We also know from maintenance that this occurred on a flight the previous day.
Original NASA ASRS Text
Title: FLT CREW OF B772 EXPERIENCE LOUD BANGING IN BELLY OF AIRPLANE UPON GEAR EXTENSION. AFTER LNDG LEARN CARGO CONTAINERS IN FORWARD COMPARTMENT ARE NOT SECURE AND WERE DAMAGED.
Narrative: ON APCH, PUT GEAR DOWN AT APPROX 3500 FT AND HAD FLAPS 20 DEGS EXTENDED. EVERYTHING AT THIS POINT WAS NORMAL. AT APPROX 2700 FT THE FO AND I HEARD SEVERAL LOUD THUMPS. WE QUICKLY CHKED ENG INSTS AND GEAR SYNOPTIC. ALL LOOKED NORMAL. SEVERAL MORE THUMPS WERE HEARD AND THE CABIN INTERPHONE STARTED RINGING. FO TRIED TO ANSWER THE CALLS BUT THE FLT ATTENDANT CONTINUALLY CALLED AND INTERPHONE DID NOT RESET, SO WE WERE NOT ABLE TO MAKE CONTACT. SINCE ALL INDICATIONS SEEMED NORMAL AT 1000 FT AND 500 FT WE DECIDED TO IGNORE THUMPS AND INTERPHONE RINGS AND JUST LAND. ON ARR WE CALLED MAINT TO RPT POSSIBLE DAMAGE IN FORWARD CARGO PIT. AT THIS TIME WE KNOW OF 3 CONTAINERS THAT WERE DAMAGED. WE ALSO KNOW FROM MAINT THAT THIS OCCURRED ON A FLT THE PREVIOUS DAY.
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.