# Service difficulty reports: Boeing 747-251B A list on [Boeing 747-251B](https://openairdocs.org/model/boeing-747-251b.md). Newest first. General aviation reporting is voluntary. Page 1 of 17 · 827 reports - [SDR KCSA201610011073](https://openairdocs.org/sdr/KCSA201610011073.md): Flap · delaminated · Oct 1, 2016 · N795CK · Boeing 747251B · Trailing Edge Flaps > LT I/B FORE FLAP HAS DELAM ON LOWER SIDE AT NR 4 T/E FLAP TRACK. - [SDR KCSA201609211071](https://openairdocs.org/sdr/KCSA201609211071.md): Lamp · burned out · Sep 21, 2016 · N795CK · Boeing 747251B · Emergency Lighting > EMERGENCY L1 CEILING LAMP OUT. - [SDR KCSA2016081701](https://openairdocs.org/sdr/KCSA2016081701.md): Garlock Seal · failed · Aug 17, 2016 · N795CK · Boeing 747251B · Turbine Engine Oil System > NR 1 ENGINE EXPIERENCED AN INFLIGHT SHUT DOWN, LOW OIL PRESSURE 0 QTY, ENGINE STABLE, OIL PRESSURE 12 PSI, WINDMILL 3 HOURS 12 MINUTES. NO PARAMETERS EXCEEDED, SHUTDOWN WITH START LEVER. PERFORMED NR 1 ENGINE WINDMILLING INSPECTION IAW AMM 72-00-00, NO DEFECTS - [SDR KCSA201604111012](https://openairdocs.org/sdr/KCSA201604111012.md): Light · inoperative · Apr 11, 2016 · N795CK · Boeing 747251B · Emergency Lighting > MAIN DECK EMERGENCY LIGHT AT BS 510 INOPERATIVE. - [SDR KCSA201604111011](https://openairdocs.org/sdr/KCSA201604111011.md): Light · inoperative · Apr 11, 2016 · N795CK · Boeing 747251B · Emergency Lighting > EMERGENCY LIGHT IN UPPER DECK BS 405 INOPERATIVE. - [SDR KCSA201512121101](https://openairdocs.org/sdr/KCSA201512121101.md): Light · no test · Dec 12, 2015 · N795CK · Boeing 747251B · Emergency Lighting > MAIN DECK EMERGENCY LIGHTS AT BS 440 AND 510 DO NOT TURN ON WHEN TESTED. - [SDR KCSA201512121100](https://openairdocs.org/sdr/KCSA201512121100.md): Light · no test · Dec 12, 2015 · N795CK · Boeing 747251B · Emergency Lighting > UPPER DECK BS 415, RT SIDE EMERGENCY LIGHT DOES NOT TURN ON WHEN TESTED. - [SDR KCSA201512121099](https://openairdocs.org/sdr/KCSA201512121099.md): Light · no test · Dec 12, 2015 · N795CK · Boeing 747251B · Emergency Lighting > UPPER DECK AFT 2 EMERGENCY LIGHTS DO NOT TURN ON WHEN TESTED. - [SDR KCSA201512121098](https://openairdocs.org/sdr/KCSA201512121098.md): Light · no test · Dec 12, 2015 · N795CK · Boeing 747251B · Emergency Lighting > L1 DOOR SILL EMERGENCY LIGHTS DO NOT TURN ON WHEN TESTED. - [SDR KCSA201512121097](https://openairdocs.org/sdr/KCSA201512121097.md): Light · no test · Dec 12, 2015 · N795CK · Boeing 747251B · Emergency Lighting > UPPER DECK R1 DOOR EXIT SIGN DOES NOT TURN ON WHEN TESTED. - [SDR KCSA201512121096](https://openairdocs.org/sdr/KCSA201512121096.md): Light · inoperative · Dec 12, 2015 · N795CK · Boeing 747251B · Emergency Lighting > UPPER DECK R1 DOOR SILL EMERGENCY LIGHTS DO NOT ILLUMNIATE. - [SDR KCSA201512101095](https://openairdocs.org/sdr/KCSA201512101095.md): Floorbeam · cracked · Dec 10, 2015 · N795CK · Boeing 747251B · Fuselage Main, Floor Beam > BS 330 LT SIDE OF UPPER DECK FLOORBEAM WEB CRACKED AT FLOORBEAM TO CIRCUMFERENTIAL FRAME JOINT. - [SDR KCSA201512051094](https://openairdocs.org/sdr/KCSA201512051094.md): Floorbeam · cracked · Dec 5, 2015 · N795CK · Boeing 747251B · Fuselage Main, Floor Beam > BS 340, RT SIDE HAS DEFECT INDICATION AT 4TH HOLE LOCATION FROM OTBD END. UPPER DECK FLOORBEAM. - [SDR KCSA201512051093](https://openairdocs.org/sdr/KCSA201512051093.md): Floorbeam · cracked · Dec 5, 2015 · N795CK · Boeing 747251B · Fuselage Main, Floor Beam > BS 330, LT SIDE OF UPPER DECK FLOORBEAM UPPER ANGLE IS CRACKED. - [SDR KCSA201512051092](https://openairdocs.org/sdr/KCSA201512051092.md): Frame · cracked · Dec 5, 2015 · N795CK · Boeing 747251B · Fuselage Main, Frame > PERFORMED OPEN HOLE HFEC ON FRAME WEB BS 360 LT SIDE AT UPPER DECK FLOOR BEAM IAW NDT MANUAL. CRACK INDICATIONS ON BOTH FRAME WEBS AT 9TH HOLE FROM OTBD END. - [SDR KCSA201512021091](https://openairdocs.org/sdr/KCSA201512021091.md): Skin · corroded · Dec 2, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > FUSELAGE SKIN IS CORRODED AT BS 980, STR 43L. - [SDR KCSA201512021090](https://openairdocs.org/sdr/KCSA201512021090.md): Keelbeam · corroded · Dec 2, 2015 · N795CK · Boeing 747251B · Fuselage Main, Keel > KEELBEAM STRUCTURE BS 1292 TO 1295 LT SIDE IS AN AREA OF CORROSION ON THE LOWER CHORD, LBL 10. - [SDR KCSA201511271089](https://openairdocs.org/sdr/KCSA201511271089.md): Skin · corroded · Nov 27, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > FUSELAGE SKIN IS CORRODED UNDER WATER SERVICE DOUBLER. - [SDR KCSA201511271088](https://openairdocs.org/sdr/KCSA201511271088.md): Strap · corroded · Nov 27, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 1860 S-27L, STRAP AT MCD CUTOUT HAS EVIDENCE OF CORROSION. - [SDR KCSA201511271087](https://openairdocs.org/sdr/KCSA201511271087.md): Spar · corroded · Nov 27, 2015 · N795CK · Boeing 747251B · Wing Spar > CORROSION AT LT WING T/E WS 590 AUXILLARY SPAR LOWER CHORD DIRECTLY UNDER NR 6 SPOILER ACTUATOR. - [SDR KCSA201511251086](https://openairdocs.org/sdr/KCSA201511251086.md): Stringer Clip · cracked · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Attach Fittings > BS 1920, S-43L, STRINGER CLIP DAMAGED. - [SDR KCSA201511251085](https://openairdocs.org/sdr/KCSA201511251085.md): Doubler · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 2028-2040, S-27L DOUBLER AT MCD CUTOUT HAS EVID OF CORROSION ON EXTERIOR SURFACE. - [SDR KCSA201511251084](https://openairdocs.org/sdr/KCSA201511251084.md): Doubler · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 2011-2020, S-27L DOUBLER AT MCD CUTOUT HAS EVIDENCE OF CORROSION ON EXTERIOR SURFACE. - [SDR KCSA201511251083](https://openairdocs.org/sdr/KCSA201511251083.md): Doubler · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 2000-2002, S-27L, DOUBLER AT MCD CUTOUT HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251082](https://openairdocs.org/sdr/KCSA201511251082.md): Strap · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 1980-2001, S-27L, STRAP AT MCD CUTOUT HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251081](https://openairdocs.org/sdr/KCSA201511251081.md): Strap · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Structure > BS 1961-2010, S-9L STRAP, MCD, EXT SURFACE HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251080](https://openairdocs.org/sdr/KCSA201511251080.md): Strap · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 2009-2042, S9L, MCD CUTOUT STRAP HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251079](https://openairdocs.org/sdr/KCSA201511251079.md): Skin · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 2168 TO 2179, S-34L, EXTERNAL SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251078](https://openairdocs.org/sdr/KCSA201511251078.md): Skin · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 1966 TO 2062, S-12L EXTERNAL SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251077](https://openairdocs.org/sdr/KCSA201511251077.md): Skin · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 2120 TO 2177, S-19L EXTERNAL SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251076](https://openairdocs.org/sdr/KCSA201511251076.md): Skin · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 2140 TO BS 2160, S-12L EXTERNAL SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511251075](https://openairdocs.org/sdr/KCSA201511251075.md): Skin · corroded · Nov 25, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 2235 TO 2184, S19L EXTERNAL SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511241074](https://openairdocs.org/sdr/KCSA201511241074.md): Stringer · corroded · Nov 24, 2015 · N795CK · Boeing 747251B · Fuselage Main, Longeron/Stringer > EVIDENCE OF CORROSION AT BS 2160 ON STRINGER 46R. - [SDR KCSA201511241073](https://openairdocs.org/sdr/KCSA201511241073.md): Uplock Bracket · corroded · Nov 24, 2015 · N795CK · Boeing 747251B · Fuselage, Landing Gear Attach Fittings > RIGHT WING BS 1301 TO BS 1307 WING LT APPROXIMATELY 170, RBL APPROXIMATELY 106, CORROSION SEVERAL LOCATIONS AS MARKED MD46. - [SDR KCSA201511241072](https://openairdocs.org/sdr/KCSA201511241072.md): Skin · corroded · Nov 24, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 2235, S18-19L, EXTERNAL SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511181070](https://openairdocs.org/sdr/KCSA201511181070.md): Support · corroded · Nov 18, 2015 · N795CK · Boeing 747251B · Fuselage Main, Structure > RT WING, BS 1319 TO BS 1335, WING LEFT APPROXIMATELY 170, RBL APPROXIMATELY 106, CORROSION MULTIPLE LOCATIONS AS MARKED MD44. - [SDR KCSA201511181069](https://openairdocs.org/sdr/KCSA201511181069.md): Skin · corroded · Nov 18, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > BS 2140 TO BS 2160 S-12 L EXTERIOR SKIN HAS EVIDENCE OF CORROSION. - [SDR KCSA201511171068](https://openairdocs.org/sdr/KCSA201511171068.md): Web · cracked · Nov 17, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 340, LT SIDE HAS DEFECT INDICATION AT 8TH HOLE LOCATION FROM OTBD END. - [SDR KCSA201511171067](https://openairdocs.org/sdr/KCSA201511171067.md): Support · corroded · Nov 17, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > KEELBEAM AREA BS 1276 IS A FAIRING SUPPORT WITH SEVERAL AREAS OF CORROSION. - [SDR KCSA201511171066](https://openairdocs.org/sdr/KCSA201511171066.md): Support · corroded · Nov 17, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > RIGHT WING BS 1307 TO 1319, WL APPROXIMATELY 170, RBL APPROXIMATELY 106, CORROSION MULTIPLE LOCATIONS. - [SDR KCSA201511121064](https://openairdocs.org/sdr/KCSA201511121064.md): Angle · corroded · Nov 12, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 1244 - 1264, WL 170, RBL 106, FOUND CORRODED. - [SDR KCSA201511091061](https://openairdocs.org/sdr/KCSA201511091061.md): Skin · cracked · Nov 9, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > LEFT FUSELAGE SKIN AT BS 344 JUST BELOW S5-L HAS THREE.5" CRACKS AND ONE 2". - [SDR KCSA201511041059](https://openairdocs.org/sdr/KCSA201511041059.md): Floorbeam · cracked · Nov 4, 2015 · N795CK · Boeing 747251B · Fuselage Main, Floor Beam > BS 360, RT SIDE HAS DEFECT INDICATION AT 8TH HOLE LOCATION FROM OTBD END. - [SDR KCSA201511041058](https://openairdocs.org/sdr/KCSA201511041058.md): Floorbeam · cracked · Nov 4, 2015 · N795CK · Boeing 747251B · Fuselage Main, Floor Beam > BS 360, RT SIDE HAS DEFECT INDICATION AT 7TH HOLE LOCATION FROM OTBD END. - [SDR KCSA201511041057](https://openairdocs.org/sdr/KCSA201511041057.md): Bulkhead Web · corroded · Nov 4, 2015 · N795CK · Boeing 747251B · Fuselage Main, Bulkhead > RIGHT BS 2598 BULKHEAD HAS EVIDINCE OF CORROSION FOUND IN WEB, 2ND LAYER, 4TH HOLE FROM BOTTOM AT APPROXIMATELY 10:00 POSITION AS VIEWED FROM AFT. - [SDR KCSA201511041056](https://openairdocs.org/sdr/KCSA201511041056.md): Skin · cracked · Nov 4, 2015 · N795CK · Boeing 747251B · Fuselage Main, Plate/Skin > RIGHT FUSELAGE SKIN AT BS 344 JUST BELOW S5-R HAS 1 EA.5" CRACKS. - [SDR KCSA201510261055](https://openairdocs.org/sdr/KCSA201510261055.md): Splice · cracked · Oct 26, 2015 · N795CK · Boeing 747251B · Fuselage Main, Bulkhead > BS 1241, BULKHEAD SPLICE STRAP RT SIDE IS CRACKED APPROXIMATELY WL 170. - [SDR KCSA201510261054](https://openairdocs.org/sdr/KCSA201510261054.md): Splice · cracked · Oct 26, 2015 · N795CK · Boeing 747251B · Fuselage Main, Bulkhead > BS 1241 BULKHEAD SPLICE STRAP LT SIDE IS CRACKED APPROXIMATELY WL 170. - [SDR KCSA201510221053](https://openairdocs.org/sdr/KCSA201510221053.md): Web · cracked · Oct 22, 2015 · N795CK · Boeing 747251B · Fuselage Miscellaneous Structure > BS 360, LT SIDE HAS DEFECT INDICATION AT 9TH HOLE LOCATION FROM OTBD END. - [SDR KCSA201510221052](https://openairdocs.org/sdr/KCSA201510221052.md): Floorbeam · corroded · Oct 22, 2015 · N795CK · Boeing 747251B · Fuselage Main, Floor Beam > FLOORBEAM UPPER CHORD AT BS 2280, LBL 12 IS CORRODED. Next page: https://openairdocs.org/model/boeing-747-251b/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE aircraft_model_key = '747251B' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/boeing-747-251b/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.