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EMB120 aircraft incurred damage to nacelle flap bracket during lowering flaps. Discovered on ground by fueler.
| Attributes | |
| ACN | 388137 |
| Time | |
| Date | 199712 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : msn |
| State Reference | WI |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | ground : preflight ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 6000 flight time type : 350 |
| ASRS Report | 388137 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : unable |
| Consequence | other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Refueler noticed nacelle flap bracket damaged and pointed it out to first officer. Attachment bracket on nacelle flap had sheared off along pre-existing crack. Flap had significant lateral and some vertical movement. No adverse flight characteristics noticed on landing or rollout. Right nacelle flap outboard support bracket had sheared and was hanging down just below trailing edge of wing. Closer inspection revealed that inboard support bracket had cracked aerodynamic fairing approximately 1-2 inches and a chafed bonding strap. Nacelle flap exhibited significant lateral movement and some vertical movement. On approach when flaps 15 degrees were selected it took approximately 5 seconds longer than normal for the flaps to deploy. No difference noted on selection of flaps 25 degrees. All cockpit indications were normal and flying pilot did not notice any adverse flying characteristics. Landing and rollout were uneventful. I was especially impressed and thankful that the refueler was both observant and had the initiative to point this problem out to the first officer.
Original NASA ASRS Text
Title: EMB120 ACFT INCURRED DAMAGE TO NACELLE FLAP BRACKET DURING LOWERING FLAPS. DISCOVERED ON GND BY FUELER.
Narrative: REFUELER NOTICED NACELLE FLAP BRACKET DAMAGED AND POINTED IT OUT TO FO. ATTACHMENT BRACKET ON NACELLE FLAP HAD SHEARED OFF ALONG PRE-EXISTING CRACK. FLAP HAD SIGNIFICANT LATERAL AND SOME VERT MOVEMENT. NO ADVERSE FLT CHARACTERISTICS NOTICED ON LNDG OR ROLLOUT. R NACELLE FLAP OUTBOARD SUPPORT BRACKET HAD SHEARED AND WAS HANGING DOWN JUST BELOW TRAILING EDGE OF WING. CLOSER INSPECTION REVEALED THAT INBOARD SUPPORT BRACKET HAD CRACKED AERODYNAMIC FAIRING APPROX 1-2 INCHES AND A CHAFED BONDING STRAP. NACELLE FLAP EXHIBITED SIGNIFICANT LATERAL MOVEMENT AND SOME VERTICAL MOVEMENT. ON APCH WHEN FLAPS 15 DEGS WERE SELECTED IT TOOK APPROX 5 SECONDS LONGER THAN NORMAL FOR THE FLAPS TO DEPLOY. NO DIFFERENCE NOTED ON SELECTION OF FLAPS 25 DEGS. ALL COCKPIT INDICATIONS WERE NORMAL AND FLYING PLT DID NOT NOTICE ANY ADVERSE FLYING CHARACTERISTICS. LNDG AND ROLLOUT WERE UNEVENTFUL. I WAS ESPECIALLY IMPRESSED AND THANKFUL THAT THE REFUELER WAS BOTH OBSERVANT AND HAD THE INITIATIVE TO POINT THIS PROB OUT TO THE FO.
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.