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Flight crew of an medium large transport receives a lightning strike causing loss of the normal stabilizer trim, yaw damper, and autoplt system.
| Attributes | |
| ACN | 326082 |
| Time | |
| Date | 199601 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : alb |
| State Reference | NY |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : alb |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 154 flight time total : 9235 flight time type : 3200 |
| ASRS Report | 326082 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
A lightning strike was experienced during let-down into albany, ny, while leveling at 11000 ft, 250 KTS. Conditions were moderate chop, light-to-moderate precipitation, true air temperature of plus 2 degrees C. A double rudder channel fault resulted in loss of normal stabilizer trim, yaw damper, and autoplt. The stabilizer trim wheel was adjusted manually to trim the stabilizer hydraulically. Runway 19 at albany had winds of 190 degrees at 17 KTS, meeting crosswind restr of maximum of 10 KTS for manual rudder condition. No emergency was declared with ATC. Operations at albany was advised of the lightning strike and need of maintenance inspection. Landed normally out of an ILS approach to runway 19 at albany. Postflt all faults were cleared. However, inspection revealed a triangular section of 1 inch dimension missing from the outboard trailing edge corner of the left horizontal stabilizer and bulging of the left horizontal stabilizer tip fairing. After conclusion of maintenance inspection, aircraft continued service under engineering authority/authorized.
Original NASA ASRS Text
Title: FLC OF AN MLG RECEIVES A LIGHTNING STRIKE CAUSING LOSS OF THE NORMAL STABILIZER TRIM, YAW DAMPER, AND AUTOPLT SYS.
Narrative: A LIGHTNING STRIKE WAS EXPERIENCED DURING LET-DOWN INTO ALBANY, NY, WHILE LEVELING AT 11000 FT, 250 KTS. CONDITIONS WERE MODERATE CHOP, LIGHT-TO-MODERATE PRECIPITATION, TRUE AIR TEMP OF PLUS 2 DEGS C. A DOUBLE RUDDER CHANNEL FAULT RESULTED IN LOSS OF NORMAL STABILIZER TRIM, YAW DAMPER, AND AUTOPLT. THE STABILIZER TRIM WHEEL WAS ADJUSTED MANUALLY TO TRIM THE STABILIZER HYDRAULICALLY. RWY 19 AT ALBANY HAD WINDS OF 190 DEGS AT 17 KTS, MEETING XWIND RESTR OF MAX OF 10 KTS FOR MANUAL RUDDER CONDITION. NO EMER WAS DECLARED WITH ATC. OPS AT ALBANY WAS ADVISED OF THE LIGHTNING STRIKE AND NEED OF MAINT INSPECTION. LANDED NORMALLY OUT OF AN ILS APCH TO RWY 19 AT ALBANY. POSTFLT ALL FAULTS WERE CLRED. HOWEVER, INSPECTION REVEALED A TRIANGULAR SECTION OF 1 INCH DIMENSION MISSING FROM THE OUTBOARD TRAILING EDGE CORNER OF THE L HORIZ STABILIZER AND BULGING OF THE L HORIZ STABILIZER TIP FAIRING. AFTER CONCLUSION OF MAINT INSPECTION, ACFT CONTINUED SVC UNDER ENGINEERING AUTH.
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.