# Service difficulty reports: Boeing 747-251F

A list on [Boeing 747-251F](https://openairdocs.org/model/boeing-747-251f.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 8 · 400 reports

- [SDR KCSA201209121197](https://openairdocs.org/sdr/KCSA201209121197.md): Fireshield · chafed · Sep 12, 2012 · N791CK · Boeing 747251F · Nacelle/Pylon, Bulkhead/Firewall
  > NR 1 PYLON O/B LOWER FIRESHIELD CHAFING BETWEEN NAC STA 190 AND 240.
- [SDR KCSA201209061193](https://openairdocs.org/sdr/KCSA201209061193.md): Bulkhead · cracked · Sep 6, 2012 · N791CK · Boeing 747251F · Nacelle/Pylon, Bulkhead/Firewall
  > NR 1 PYLON NAC STA 180 BULKHEAD WEB RIGHT SIDE APPROX 6" FROM TOP AND 3" FROM I/B SIDE.
- [SDR KCSA201205191080](https://openairdocs.org/sdr/KCSA201205191080.md): Skin · cracked · May 19, 2012 · N791CK · Boeing 747251F · Nacelle/Pylon, Plate/Skin
  > NR 1 PYLON OUTBOARD SKIN IS CRACKED AT NAC STA 197.
- [SDR KCSA201205151079](https://openairdocs.org/sdr/KCSA201205151079.md): Light · inoperative · May 15, 2012 · N791CK · Boeing 747251F · Emergency Lighting
  > MAIN DECK EMERGENCY LIGHTS INOP, LEFT, BS 1854.
- [SDR KCSA201202271022](https://openairdocs.org/sdr/KCSA201202271022.md): Skin · cracked · Feb 27, 2012 · N791CK · Boeing 747251F · Nacelle/Pylon, Plate/Skin
  > NR 3 PYLON I/B SIDE LOWER SKIN HAS 2 INCH CRACK AT NAC STA 230.
- [SDR KCSA2501202271021](https://openairdocs.org/sdr/KCSA2501202271021.md): Fireshield · damaged · Feb 27, 2012 · N791CK · Boeing 747251F · Nacelle/Pylon, Bulkhead/Firewall
  > NR 3 PYLON LT FIRESHIELD DAMAGED APPROX NAC STA 230.
- [SDR KCSA11053](https://openairdocs.org/sdr/KCSA11053.md): Engine · surges · Sep 16, 2011 · N791CK · Boeing 747251F · Engine (Turbine/Turboprop)
  > NR 4 ENGINE SURGED DURING CONSTANT POWER. ENGINE WAS SHUT DOWN. ENGINE WAS SURGING AT CLIMB THRUST PRIOR TO SHUTDOWN. ENGINE WIND MILLED FOR 40 MINUTES. EGT EXCEEDANCE WARNING 730°. FAILURE OCCURRED AT 0545Z DURING CLIMB. SYSTEM NR 2 IGNITION. ZERO REST
- [SDR KCSA111099](https://openairdocs.org/sdr/KCSA111099.md): Light · inoperative · Apr 19, 2011 · N791CK · Boeing 747251F · Emergency Lighting
  > L1 MAIN ENTRY DOOR SILL LIGHT INOPERATIVE.
- [SDR KCSA111098](https://openairdocs.org/sdr/KCSA111098.md): Light · inoperative · Apr 19, 2011 · N791CK · Boeing 747251F · Emergency Lighting
  > MAIN DECK EMERGENCY LIGHT NEAR L1 MAIN ENTRY DOOR AT LBL 78 DOES NOT COME ON WHEN TESTED.
- [SDR KCSA11012](https://openairdocs.org/sdr/KCSA11012.md): Fitting · cracked · Mar 10, 2011 · N791CK · Boeing 747251F · Hydraulic System, Main
  > NR 1 HYDAULIC FLUID AND PRESSURE LOSS AFTER GEAR RETRACTION, POSITION ADP OFF AND EDP TO DEPRESSURE PER QRH. HYD OVERHEAT LIGHT ON, 1 GALLON FLUID REMAINING. FOUND NR 1 ENGINE ADP PRESSURE LINE WITH CRACKED UNION FITTING. REMOVED AND REPLACED UNION IAW B747
- [SDR KCSA101178](https://openairdocs.org/sdr/KCSA101178.md): Light · inoperative · Nov 11, 2010 · N640US · Boeing 747251F · Emergency Lighting
  > UPPER DECK EMERGENCY EXIT DOOR SILL LIGHTS INOPERATIVE.
- [SDR KCSA101177A](https://openairdocs.org/sdr/KCSA101177A.md): Fireshield · worn · Nov 11, 2010 · N640US · Boeing 747251F · Nacelle/Pylon Miscellaneous Structure
  > NR 4 PYLON I/B LOWER FIRESHIELD WORN AT NAC STA 228.
- [SDR KCSA101176](https://openairdocs.org/sdr/KCSA101176.md): Stringer · corroded · Nov 2, 2010 · N640US · Boeing 747251F · Fuselage Main, Longeron/Stringer
  > STR 47R CORRODED AT BS 790.
- [SDR KCSA101166](https://openairdocs.org/sdr/KCSA101166.md): Stiffener · cracked · Oct 29, 2010 · N644NW · Boeing 747251F · Fuselage Miscellaneous Structure
  > STIFFENER CRACKED.250 INCH AT STA 420 LBL 8 AFT SIDE OF FLOORBEAM.
- [SDR KCSA101164](https://openairdocs.org/sdr/KCSA101164.md): Frame · cracked · Oct 29, 2010 · N640US · Boeing 747251F · Fuselage Main, Frame
  > BS 2360 LBL 30 WL 304 FRAME HAS 3 INCH CRACK IN WEB.
- [SDR KCSA101163](https://openairdocs.org/sdr/KCSA101163.md): Support Angle · cracked · Oct 26, 2010 · N640US · Boeing 747251F · Cargo/Baggage Doors
  > LOWER AFT CARGO DOOR AT STA 1900 FWD ACTUATOR FITTING SUPPORT ANGLE CRACKED 3 INCHES.
- [SDR KCSA101162](https://openairdocs.org/sdr/KCSA101162.md): Seat Track · corroded · Oct 26, 2010 · N640US · Boeing 747251F · Fuselage, Seat/Cargo Attach Fittings
  > UPPER DECK STA 540 LBL 48 SEAT TRACK HAS CORROSION.
- [SDR KCSA101156](https://openairdocs.org/sdr/KCSA101156.md): Skin · cracked · Oct 21, 2010 · N640US · Boeing 747251F · Fuselage Main, Plate/Skin
  > FUSELAGE SKIN CRACKED AT TOP OF R3 WINDOW OPENING, BS 336.
- [SDR KCSA101155](https://openairdocs.org/sdr/KCSA101155.md): Brace · chafed · Oct 21, 2010 · N640US · Boeing 747251F · Nacelle/Pylon Miscellaneous Structure
  > NR 2 PYLON DIAGONAL BRACE CHAFED BEYOND LIMITS.
- [SDR KCSA101154](https://openairdocs.org/sdr/KCSA101154.md): Stringer · corroded · Oct 21, 2010 · N640US · Boeing 747251F · Fuselage Main, Longeron/Stringer
  > STR 49R CORRODED BETWEEN BS1880 AND 1920.
- [SDR KCSA101149](https://openairdocs.org/sdr/KCSA101149.md): Light · inoperative · Oct 14, 2010 · N640US · Boeing 747251F · Fuselage Main, Plate/Skin
  > EMERGENCY SLIDE LIGHT INOP.
- [SDR KCSA101148](https://openairdocs.org/sdr/KCSA101148.md): Light · inoperative · Oct 14, 2010 · N640US · Boeing 747251F · Fuselage Main, Plate/Skin
  > UPPER DECK EXIT DOOR EMERGENCY LIGHT INOP.
- [SDR KCSA101147](https://openairdocs.org/sdr/KCSA101147.md): Sign · inoperative · Oct 14, 2010 · N640US · Boeing 747251F · Emergency Lighting
  > UPPER DECK EXIT DOOR SIGN IS INOP.
- [SDR NWAA094076739](https://openairdocs.org/sdr/NWAA094076739.md): Battery Pack · discharged · Nov 28, 2009 · N639US · Boeing 747251F · Emergency Lighting
  > DURING OVERNIGHT CHECK, MAINTENANCE FOUND RIGHT UPPER DECK EMERGENCY DOOR EXIT SIGN INOPERATIVE. MAINTENANCE REPLACED THE BATTERY PACK IN POWER SUPPLY MODULE M312. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.
- [SDR NWAA092486739](https://openairdocs.org/sdr/NWAA092486739.md): Battery Pack · discharged · Jul 10, 2009 · N639US · Boeing 747251F · Emergency Lighting
  > DURING AN OVERNIGHT LINE CHECK THE EMERGENCY LIGHTS IN THE DOOR JAMB OF DOOR 1R WOULD NOT ILLUMINATE. MAINTENANCE FOUND THE ASSOCIATED BATTERY PACK INOPERATIVE AND REPLACED IT. SYSTEM OPERATION WAS NORMAL AFTER REPLACEMENT.
- [SDR NWAA085286739](https://openairdocs.org/sdr/NWAA085286739.md): Skin · gouged · Nov 24, 2008 · N639US · Boeing 747251F · Fuselage Main, Plate/Skin
  > DURING GROUND OPS FUSELAGE SKIN WAS DENTED AND GOUGED AT AFT EDGE OF FORWARD CARGO DOOR CUTOUT AT BS 674 S38 AND FRAME CHORD WAS DENTED JUST BELOW S37. REPAIRED PER EA 67-214354 SECTION I AND SECTION II. SECTION III TO BE DETERMINED PER BOEING DATA TOLERANCE
- [SDR NWAA083976729](https://openairdocs.org/sdr/NWAA083976729.md): Battery · inoperative · Aug 21, 2008 · N629US · Boeing 747251F · Emergency Lighting
  > DURING OVERNIGHT CHECK FOUND COCKPIT EXIT SIGN WOULD NOT TEST. MAINTENANCE REMOVED AND REPLACED BATTERY. OPERATIONAL CHECKED GOOD, AND ACFT WAS RETURNED TO SERVICE. (S)
- [SDR NWAA082546740](https://openairdocs.org/sdr/NWAA082546740.md): Brake · fire · Jun 3, 2008 · N640US · Boeing 747251F · Landing Gear Brake System
  > ON TAXI IN BRAKE TEMP OVERHEAT LIGHT ILLUMINATED AND LT WING AND BODY GEAR TEMP GAUGES INDICATED IN RED ZONE. LT WING AND BODY BRAKES CAUGHT FIRE. THE FIRE DEPARTMENT WAS DISPATCHED AND EXTINGUISHED THE FIRE. MAINTENANCE REMOVED AND REPLACED LT SIDE 1-8 WIN
- [SDR NWAA082056729](https://openairdocs.org/sdr/NWAA082056729.md): Battery Pack · inoperative · May 11, 2008 · N629US · Boeing 747251F · Emergency Lighting
  > DURING OVERNIGHT CHECK, FOUND UPPER DECK EXIT DOOR SLIDE EMERGENCY LIGHTS INOP. MAINTENANCE REMOVED AND REPLACED BATTERY PACK. OPERATIONAL CHECKED GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.
- [SDR NWAA081726740](https://openairdocs.org/sdr/NWAA081726740.md): Bulkhead · cracked · Apr 21, 2008 · N640US · Boeing 747251F · Nacelle/Pylon, Bulkhead/Firewall
  > DURING "L" CHECK, FOUND CRACK IN NR 4 ENGINE PYLON AFT BULKHEAD RT FRAME WEB AT NAC STA 221.9. REPAIRED PER EA 67-212661.
- [SDR NWAA081706740](https://openairdocs.org/sdr/NWAA081706740.md): Structure · misrepaired · Apr 17, 2008 · N640US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "L" CHECK WHILE ACCOMPLISHING VERTICAL BEAM INSPECTION FOUND DISCREPANT EXISTING REPAIR DOUBLER AND CRACK COMMON TO THE NOSE WHEEL WELL VERTICAL BEAM WEB AT BS 320 RT BETWEEN WL 180-WL 190. THE EXISTING REPAIR DOUBLER OBSTRUCTS THE SURFACE SCAN HFEC RE
- [SDR NWAA081716740](https://openairdocs.org/sdr/NWAA081716740.md): Structure · misrepaired · Apr 17, 2008 · N640US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "L" CHECK WHILE ACCOMPLISHING VERTICAL BEAM INSPECTION FOUND DISCREPANT EXISTING REPAIR DOUBLER COMMON TO THE NOSE WHEEL WELL VERTICAL BEAM WEB AT BS 320 LT BETWEEN WL 180-WL 190. THE EXISTING REPAIR DOUBLER OBSTRUCTS THE SURFACE SCAN HFEC REQUIRED BY
- [SDR NWAA081866717](https://openairdocs.org/sdr/NWAA081866717.md): Skin · damaged · Apr 10, 2008 · N617US · Boeing 747251F · Fuselage Main, Plate/Skin
  > DURING LINE MAINTENANCE, FUSELAGE SKIN WAS DAMAGED BETWEEN BS 2680 AND BS 2690 LBL 5. REPAIRED PER EA 67-211627.
- [SDR NWAA073996740](https://openairdocs.org/sdr/NWAA073996740.md): Smoke Detector · false indication · Dec 9, 2007 · N640US · Boeing 747251F · Smoke Detection
  > DURING FLIGHT, MAIN DECK CARGO SMOKE DETECTOR ZONE 4 WARNING LIGHT WITH CARGO FIRE LIGHT CAME ON. COM PROCEDURE COMPLIED WITH. NO VISUAL SIGN OF SMOKE OR OTHER SUBSTANCES. MAINTENANCE REPLACED 4A SMOKE DETECTOR. OPERATIONAL CHECKED GOOD AND AIRCRAFT WAS RE
- [SDR NWAA073986740](https://openairdocs.org/sdr/NWAA073986740.md): Connector · dirty · Dec 9, 2007 · N640US · Boeing 747251F · Fire Detection
  > MAIN DECK CARGO SMOKE DETECTOR ZONE 4 LIGHT CAME ON ALONG WITH THE CARGO FIRE LIGHT AND BELL. AFTER 20 MINUTES THE LIGHTS WENT OUT. TESTED SYSTEM AND TEST OK. MAINTENANCE CLEANED PLUG ON DETECTOR AND TEST OK. OPERATIONAL CHECKED GOOD AND AIRCRAFT WAS RETUR
- [SDR NWAA073616717](https://openairdocs.org/sdr/NWAA073616717.md): Terminal Block · smoke · Oct 29, 2007 · N617US · Boeing 747251F · Ice/Rain Protection System Wiring
  > DURING FLIGHT, SMOKE WAS NOTED PILOTS L-1 WINDOW LOWER LEFT TERMINAL BLOCK WAS SMOKING AND APPEARS MELTED. POWER TO L-1 WINDOW WAS TURNED OFF AND SMOKE AND SMELL DISSIPATED. FLIGHT CONTINUED ON AND LANDING WAS UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED NR
- [SDR NWAA073116719](https://openairdocs.org/sdr/NWAA073116719.md): Tension Tie · cracked · Sep 2, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACKS IN UPPER LOBE TENSION TIE CHANNEL FASTENER HOLES AT BS 800 LT. REPAIRED PER EA 67-209739.
- [SDR NWAA073076719](https://openairdocs.org/sdr/NWAA073076719.md): Frame · deformed · Sep 2, 2007 · N619US · Boeing 747251F · Fuselage Main, Frame
  > DURING "M" CHECK, FOUND DEFORMATION DAMAGE TO FRAME INNER CHORD AT BS 1860 S11R. REPAIRED PER EA 67-209754.
- [SDR NWAA073156719](https://openairdocs.org/sdr/NWAA073156719.md): Floor Support · corroded · Sep 2, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CORROSION ON UPPER CHORD OF MAIN DECK FLOOR BEAM BS 1140 TO BS 1180 RBL 55. REPAIRED PER EA 67-209750.
- [SDR NWAA073066719](https://openairdocs.org/sdr/NWAA073066719.md): Bulkhead · worn · Sep 1, 2007 · N619US · Boeing 747251F · Fuselage Main, Bulkhead
  > DURING "M" CHECK, FOUND WEAR ON BULKHEAD AT BS 2360 S26L. REPAIRED PER EA 67-209753.
- [SDR NWAA073176719](https://openairdocs.org/sdr/NWAA073176719.md): Skin · dented · Sep 1, 2007 · N619US · Boeing 747251F · Fuselage Main, Plate/Skin
  > DURING "M" CHECK, FOUND DENTS IN FUSELAGE SKIN AT BS 1920 S31R TO S34R. REPAIRED PER EA 67-209752.
- [SDR NWAA073106719](https://openairdocs.org/sdr/NWAA073106719.md): Tension Tie · cracked · Aug 31, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACKS IN UPPER LOBE TENSION TIE FRAME WEB DOUBLER AT BS 900 LT. REPAIRED PER EA 67-209740.
- [SDR NWAA073086719](https://openairdocs.org/sdr/NWAA073086719.md): Reveal · cracked · Aug 31, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACK IN MAIN DECK L5 DOOR FORWARD CUTOUT REVEAL DOUBLER AT BS 2231 BETWEEN S16L TO S18L. REPAIRED PER EA 67-209747.
- [SDR NWAA073056719](https://openairdocs.org/sdr/NWAA073056719.md): Frame · cracked · Aug 31, 2007 · N619US · Boeing 747251F · Fuselage Main, Frame
  > DURING "M" CHECK, FOUND CRACKS IN FRAME AT BS 280 S24R TO S24L. REPAIRED PER EA 67-209749.
- [SDR NWAA072946719](https://openairdocs.org/sdr/NWAA072946719.md): Battery Pack · inoperative · Aug 30, 2007 · N619US · Boeing 747251F · Emergency Lighting
  > DURING OVERNIGHT CHECK, FOUND UPPER DECK DOOR THRESHOLD EMERGENCY LIGHTS INOP. MAINTENANCE REMOVED AND REPLACED BATTERY PACK. OPERATIONAL CHECKED GOOD AND AIRCRAFT RETURNED TO SERVICE.
- [SDR NWAA073096719](https://openairdocs.org/sdr/NWAA073096719.md): Frame · cracked · Aug 29, 2007 · N619US · Boeing 747251F · Fuselage Main, Frame
  > DURING "M" CHECK, FOUND CRACKS IN FRAME WEB DOUBLER AT BS 880 S9L. REPAIRED PER EA 67-209743.
- [SDR NWAA073126719](https://openairdocs.org/sdr/NWAA073126719.md): Tension Tie · cracked · Aug 28, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACKS IN UPPER LOBE TENSION TIE CHANNEL FASTENER HOLES AT BS 860 LT. REPAIRED PER EA 67-209738.
- [SDR NWAA073146719](https://openairdocs.org/sdr/NWAA073146719.md): Tension Tie · cracked · Aug 28, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACKS IN UPPER LOBE TENSION TIE CHANNEL FASTENER HOLES AT BS 820 RT. REPAIRED PER EA 67-209736.
- [SDR NWAA073166719](https://openairdocs.org/sdr/NWAA073166719.md): Tension Tie · cracked · Aug 28, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACKS IN UPPER LOBE TENSION TIE CHANNEL FASTENER HOLES AT BS 920 LBL 40 AND LBL 43. REPAIRED PER EA 67-209741.
- [SDR NWAA073136719](https://openairdocs.org/sdr/NWAA073136719.md): Tension Tie · cracked · Aug 24, 2007 · N619US · Boeing 747251F · Fuselage Miscellaneous Structure
  > DURING "M" CHECK, FOUND CRACKS IN UPPER LOBE TENSION TIE CHANNEL AND WEB FASTENER HOLES AT BS 840 LT. REPAIRED PER EA 67-209737.

Next page: https://openairdocs.org/model/boeing-747-251f/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 = '747251F'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/boeing-747-251f/reports

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