# N681UP: 1970 Boeing 747-121, registration cancelled 2011-12-08

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: December 8, 2011
- Status when cancelled: Valid registration
- Airframe: [Boeing 747-121](https://openairdocs.org/model/boeing-747-121) (registry code 1384871)
- Engine: [Pratt & Whitney JT9D-3A](https://openairdocs.org/engine/pratt-whitney-jt9d-3a) (registry code 52050)
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE), [TCDS E20EA](https://openairdocs.org/tcds/E20EA) (OpenAirDocs)
- Serial number: 19661
- Year built: 1970
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: August 1, 1970
- Last registry action: December 8, 2011
- Mode S code: A908BE
- Owner when cancelled: [Stewart Industries International LLC](https://openairdocs.org/faa-owner/STEWART%20INDUSTRIES%20INTERNATIONAL%20LLC)
- Location: [Guthrie, OK](https://openairdocs.org/faa-place/OK/Guthrie)
- Owner type: Corporation
- Owner's area on the map: 35.8679° N, 97.4344° W: Placed by OpenAirDocs at the center of ZIP code 73044, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N681UP
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=681UP
- Page: https://openairdocs.org/deregistered/N681UP-2011-12-08

From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Boeing 747-121: https://openairdocs.org/model/boeing-747-121.md

## Service difficulty reports (468, newest 50)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR UPS07449230](https://openairdocs.org/sdr/UPS07449230), Feb 15, 2007: STRUCTURE. CRACKED. INSPECTION TYPE:C 1EA FASTENER HOLE FOUND CRACKED AT BS 460 S15L BONDED STRAP, CRACK LOCATED AT DOWNWARD DIRECTION. BS 460 S15L CRACKED BONDED STRAP REPAIRED AS
- [SDR UPS07449229](https://openairdocs.org/sdr/UPS07449229), Feb 15, 2007: STRINGER. CRACKED. INSPECTION TYPE:C 1EA FASTENER HOLE FOUND CRACKED AT BS 460 S15L CRACKS WERE LOCATED AT UPWARD AND DOWNWARD DIRECTION. STRINGER REPLACED AS PER SRM 51-10-01 PG 
- [SDR UPS07449228](https://openairdocs.org/sdr/UPS07449228), Feb 15, 2007: STRINGER. CRACKED. INSPECTION TYPE:C 1EA FASTENER HOLE FOUND CRACKED AT BS 460 S15R CRACKS WERE LOCATED AT UPWARD AND DOWNWARD DIRECTION. STRINGER REPLACED AS PER SRM 51-10-01 PG 
- [SDR UPS06448761](https://openairdocs.org/sdr/UPS06448761), Dec 12, 2006: BATTERY PACK. INOPERATIVE. UPPER HALLWAY EMERGENCY LIGHT BATTERY PACK INOP. REMOVED AND REPLACED EMERGENCY BATTERY PACK IAW AMM 33-51-00. OPS CK NORMAL.
- [SDR UPS06448243](https://openairdocs.org/sdr/UPS06448243), Oct 13, 2006: CONTROL PANEL. MALFUNCTIONED. INSPECTION TYPE:PFLT ON PRE FLT, FOUND EMERG EXIT LT PANEL UNARMED LT ILLUM WITH SWITCH IN ARMED POS. REMOVED AND REPLACED EMERG LT PANEL ON OVERHEAD. OPS CK GO
- [SDR UPS06447671](https://openairdocs.org/sdr/UPS06447671), Aug 14, 2006: SPOILER. INOPERATIVE. DIVERSION, NR 5 SPOILER WOULD NOT RETRACT. LEFT WING NR 5 SPOILER ROD AND TRAILING EDGE SUPPORT. A/C FERRIED TO SDF FOR REPAIR. STARTED ECA FORM 011205 COMPLETE
- [SDR UPS06447398](https://openairdocs.org/sdr/UPS06447398), Jul 22, 2006: SKIN. WORN. NR 4 PYLON INNER VERT WEB O/B SIDE SKIN WORN THROUGH GREATER THAN 50% OF THICKNESS ALONG THE ENTIRE LENGTH DUE TO CONTACT WITH THE CORE COWL. FABRICATED REPAIR 
- [SDR UPS06447397](https://openairdocs.org/sdr/UPS06447397), Jul 22, 2006: SKIN. WORN. NR 4 PYLON INSIDE VERT WEB INBD SKIN WORN THROUGH AT AFT END PEELING AND MISSING AT FWD END. DRILLED OFF INNER STAINLESS AND TRIMMED OUT DAMAGE SKIN 1" BY 9.5".
- [SDR UPS06447315](https://openairdocs.org/sdr/UPS06447315), Jul 11, 2006: LIGHT. INOPERATIVE. EMERGENCY LIGHTS ABOVE CREW STAIRS INOP. REMOVED AND REPLACED EMERGENCY LIGHT ASSEMBLY AT SPIRAL STAIRWELL REF UPS 747 M/M CHAP 33-51-04. OPS CHECKED OK.
- [SDR UPS06447294](https://openairdocs.org/sdr/UPS06447294), Jul 5, 2006: SUPPORT TUBE. CRACKED. RT WING LEADING EDGE TENSION SUPPORT TUBE CRACKED. REMOVED AND REPLACED LEADEING EDGE PANEL SUPPORT TUBE ASSY. IN REF RO STANDARD PRACTICES 20-51-01. OK FOR SER
- [SDR UPS06446541](https://openairdocs.org/sdr/UPS06446541), Mar 21, 2006: FLOORBEAM. CRACKED. BS 2060 RBL 98 FLOOR SUPPORT BRACKET FOUND CRACK, CRACK LENGTH 0.75". SUPPORT BRACKET REPLACED AS PER SRM 51-10-01 PG 9 AND INSTALLED AS PER SRM 51-30-02.
- [SDR UPS06446540](https://openairdocs.org/sdr/UPS06446540), Mar 19, 2006: FLOORBEAM. CRACKED. BS 2060 RBL 60 LATERAL FLOOR SUPPORT LWR SUPT ANGLE FOUND CRACKED, CRACK LENGTH 3" AND 2.5". SUPPORT ANGLE REPLACED AS PER SRM 51-10-01 PG 9 AND INSTALLED AS PE
- [SDR UPS06446607](https://openairdocs.org/sdr/UPS06446607), Mar 16, 2006: FITTING. CHAFED. FX INTERIOR STRINGER END FTG FOUND DEEP CHAFING MARK AT STA 2598 BHD AFT FACE AT S49L, 51R, 51L TOTAL 3EA. BS 2598 BHD AFT STR 51L, 51R END FTG REPLACED AND INS
- [SDR UPS06446542](https://openairdocs.org/sdr/UPS06446542), Mar 16, 2006: RIB. CRACKED. LT MLG WW I/B DOOR FWD VERTICAL BEAM LOWER RIB FOUND CORROSION CRACKED AT INTERIOR SURFACE, DURING LOWER BEAM REMOVED, CRACK LENGTH 1/2". RIB REPLACED AND INSTA
- [SDR UPS06446520](https://openairdocs.org/sdr/UPS06446520), Mar 16, 2006: STRINGER. CRACKED. FOUND FUSELAGE SKIN REMOVED STRINGER FOUND CRACKED AT STA 2598 TO STA 2600 STR 51R, CRACK LENGTH 1/2". FOUND BS 2598 TO BS 2638 STR 51R REPLACED AS PER SRM 51-1
- [SDR UPS06446630](https://openairdocs.org/sdr/UPS06446630), Mar 15, 2006: SKIN. CORRODED. BS 1040-1044 LBL 123 WING CTR SECTION UPPER FACE FOUND CORROSION. CORROSION BLEND OUT 0.063" BY 4" BY 4" EXCEED SRM 57-30-01 FIG 1 LIMITS, M/D BS 1040-1044 LBL 
- [SDR UPS06446634](https://openairdocs.org/sdr/UPS06446634), Mar 14, 2006: LONGERON. CRACKED. M/D BS 1235-1241 LBL 11 LONGERON LOWER CHORD FOUND CRACK, CRACK LENGTH 3/4". M/DECK BS 1226 TO BS 1241 LBL 11 FLOORBEAM LOWER CHORD REPAIRED AS PER HX RS NR R57
- [SDR UPS06446623](https://openairdocs.org/sdr/UPS06446623), Mar 14, 2006: WEB. CORRODED. BS 1235-1241 WING CTR SECTION UPPER FACE LBL 12-33 FOUND BULGE UP ( 2 LOCATIONS). CORROSION BLEND OUT 0.140" BY 2.5" BY 6" EXCEED SRM 57-30-01 FIG 1 LIMITS. REP
- [SDR UPS06446611](https://openairdocs.org/sdr/UPS06446611), Mar 14, 2006: FLOORBEAM. CRACKED. BS 660 UPPER DECK FLOORBEAM HORIZ FWD FLANGE FOUND CRACKED AT LBL 67" ONE FASTENER HOLE 0.030" IN LENGTH RUNNING FWD O/B AND AT LBL 79" ONE FASTENER HOLE 0.030"
- [SDR UPS06446609](https://openairdocs.org/sdr/UPS06446609), Mar 14, 2006: FLOORBEAM. CRACKED. BS 400 UPPER DECK FLOORBEAM FWD HORIZ FLANGE RBL 13" FASTENER HOLE FOUND CRACKED APPROX 0.040" IN LENGTH RUNNING FWD. BS 400 UPPER DECK FLOORBEAM FWD HORIZ FLAN
- [SDR UPS06446608](https://openairdocs.org/sdr/UPS06446608), Mar 14, 2006: FLOORBEAM. CRACKED. BS 600 UPPER DECK FLOORBEAM AFT HORIZ FLANGE FOUND CRACK AT RBL 54, 57 AND 60 APPROX 1/8", 1/8 , 1/16" RESPECTIVELY ALL RUNNING AFT. U/D BS 600 FLOORBEAM AFT HO
- [SDR UPS06446599](https://openairdocs.org/sdr/UPS06446599), Mar 14, 2006: CARGO TRACK. CORRODED. BS 1030-1040 LBL 11 TIE DOWN TRACK FLANGE LWR FACE FOUND CORRODED. CORROSION BLEND OUT 0.077" BY 1" BY 3" EXCEED SRM 53-10-01 FIG 1 LIMIT. BS 1000-1130 LBL 11" 
- [SDR UPS06446592](https://openairdocs.org/sdr/UPS06446592), Mar 14, 2006: CARGO TRACK. CORRODED. BS 2020-2040 RBL 33 TIE DOWN TRACK O/B FLANGE FOUND CORRODED. CORROSION BLEND OUT 0.025" BY 0.5" X 1.5" EXCEED SRM LIMIT. NEW SECTION TIE DOWN TRACK INSTALLED A
- [SDR UPS06446588](https://openairdocs.org/sdr/UPS06446588), Mar 14, 2006: FLOORBEAM. CORRODED. BS 1170 LBL11 TO RBL11 LATERAL FLOORBEAM FOUND CORRODED. CORROSION BLEND OUT 0.042" BY 3/4" BY 2" EXCEED SRM LIMIT. BS 1170 LBL 11 TO RBL 11 FLOORBEAM REPLACED 
- [SDR UPS06446582](https://openairdocs.org/sdr/UPS06446582), Mar 14, 2006: FLOOR SUPPORT. CORRODED. INSPECTION TYPE:C M/D- BS 1180 LBL 116 LONGITUDINAL FLR SUPPORT FOUND COR. CORROSION BLEND OUT 0.023" X 5/8" X 1.5" EXCEED SRM 53-10-01 FIG 1 LIMITS, THE FLOOR 
- [SDR UPS06446581](https://openairdocs.org/sdr/UPS06446581), Mar 14, 2006: CARGO TRACK. CORRODED. INSPECTION TYPE:C M/D- BS 2110-2120 RBL 33 TIE DOWN TRACK O/B SPLICE FLANGE FOUND COR. CORROSION BLEND OUT 0.031" X 3/4" X 1/2" EXCEED SRM 53-10-01 FIG 1 LIMITS
- [SDR UPS06446576](https://openairdocs.org/sdr/UPS06446576), Mar 14, 2006: CARGO TRACK. CORRODED. BS 2090-2110 LBL 66 TIE DOWN TRACK FLANGE FOUND CORROSION. CORROSION BLEND OUT 0.035" BY 1" BY 1.5" EXCEED SRM 53-10-01 FIG 1 LIMITS, BS 2070 TO BS 2150 LBL 66 
- [SDR UPS06446574](https://openairdocs.org/sdr/UPS06446574), Mar 14, 2006: FLOORBEAM. CORRODED. BS 1253 LBL 11 TO RBL 11 LATERAL FLOOR SUPPORT FOUND CORRODED. CORROSION BLEND OUT 0.045" BY 1.5" BY 2" EXCEED SRM LIMIT. FLOOR SUPPORT REPLACED AS PER SRM 51-1
- [SDR UPS06446571](https://openairdocs.org/sdr/UPS06446571), Mar 14, 2006: SUPPORT. CORRODED. BS 1100 LBL78-96 LATERAL FLOOR SUPPORT FOUND CORRODED. CORROSION BLEND OUT 0.050" BY 3/8" BY 7/8" EXCEEDED SRM LIMIT. LATERAL FLOOR SUPPORT REPLACED AS PER SRM 
- [SDR UPS06446566](https://openairdocs.org/sdr/UPS06446566), Mar 14, 2006: FLOORBEAM. CORRODED. BS 1200 LBL 78 TIE DOWN FTG FLANGE FOUND CORRODED. CORROSION BLEND OUT 0.037" BY 3/4" BY 1" EXCEED SRM LIMIT. TIE DOWN FTG REPLACED AS PER MM 53-42-00.
- [SDR UPS06446555](https://openairdocs.org/sdr/UPS06446555), Mar 14, 2006: CARGO TRACK. CORRODED. BS 2160 RBL33 TIE DOWN FTG AFT FLANGE FOUND CORRODED. CORROSION BLEND OUT 0.020" BY 0.5" BY 0.5" EXCEED SRM LIMIT. TIE DOWN FITTING REPLACED AS PER MM 53-42-00.
- [SDR UPS06446554](https://openairdocs.org/sdr/UPS06446554), Mar 14, 2006: CARGO TRACK. CORRODED. BS 1960 LBL 76-80 TIE DOWN FTG FLANGE FOUND CORRODED. CORROSION BLEND OUT 0.007" BY 0.5" BY 1" EXCEED SRM LIMIT. TIE DOWN FTG REPLACED AS PER MM 20-51-01.
- [SDR UPS06446553](https://openairdocs.org/sdr/UPS06446553), Mar 14, 2006: FLOORBEAM. CORRODED. BS 2060 RBL98-116 FLOORBEAM LWR FACE FOUND CORRODED. CORROSION BLEND OUT 0.035" BY 1.5" BY 2" EXCEED SRM LIMIT. FLOORBEAM REPAIRED AS PER SRM 51-40-04 FIG 1 JUS
- [SDR UPS06446552](https://openairdocs.org/sdr/UPS06446552), Mar 14, 2006: REVEAL. CRACKED. BS 2231 STR 24L FOUND 1 HOLE CRACKED AT AFT FRAME INNER CHORD AS MARKED, CRACK LENGTH 3/4" AT REVEAL, 0.030"/0.040" AT CHORD. CABIN BS 2231 AFT FRAME INNER CHOR
- [SDR UPS06446550](https://openairdocs.org/sdr/UPS06446550), Mar 14, 2006: FLOORBEAM. CORRODED. BS 2100 RBL 98-116 FLOORBEAM FOUND HEAVY CORROSION. CORROSION BLEND OUT 0.060" BY 2" BY 3" EXCEED SRM 53-10-01 FIG 1 LIMITS. BS 2100 RBL 22" TO RT MOST O/B FLOO
- [SDR UPS06446526](https://openairdocs.org/sdr/UPS06446526), Mar 14, 2006: FLOORBEAM. CORRODED. BS 2240 LBL 33 TO 75 FLOORBEAM FOUND CORODED. CORROSION BLEND OUT 0.064" BY 2" BY 3" EXCEED SRM 53-10-01 FIG 1 LIMITS, M/D BS 2240 LBL 13 TO LT O/B FLOORBEAM RE
- [SDR UPS06446525](https://openairdocs.org/sdr/UPS06446525), Mar 14, 2006: FLOORBEAM. CORRODED. BS 2280 LBL 74-78 FLOORBEAM FOUND CORODED. CORROSION BLEND OUT 0.062" BY 2" BY 2" EXCEED SRM 53-10-01 FIG 1 LIMITS, M/D - BS 2280 LBL 46 TO MOST LT O/B FLOORBEA
- [SDR UPS06446523](https://openairdocs.org/sdr/UPS06446523), Mar 14, 2006: FLOOR SUPPORT. CORRODED. FOUND BS 2020-2040 RBL 116 LONGITUDINAL FLOOR SUPPORT CORRODED. CORROSION BLEND OUT 0.016" BY 1" BY 10" EXCEED SRM 53-10-01 FIG 1 LIMITS, FLOOR SUPPORT REPAIRED
- [SDR UPS06446522](https://openairdocs.org/sdr/UPS06446522), Mar 14, 2006: FLOOR SUPPORT. CORRODED. BS 2080-2100 LBL 98-110 LONGITUDINAL FLOOR SUPPORT FOUND CORROSION. CORROSION BLEND OUT 0.052" BY 1/2" BY 1/2" EXCEED SRM 53-10-01 FIG 1 LIMITS, FLR SUPPORT REP
- [SDR UPS06446521](https://openairdocs.org/sdr/UPS06446521), Mar 14, 2006: FLOOR SUPPORT. CORRODED. FOUND BS 1920-2020 LBL 116 LONGITUDINAL FLOOR SUPPORT FOUND CORRODED. CORROSION BLEND OUT 0.016" BY 1/2" BY 20" EXCEED SRM 53-10-01 FIG 1 LIMITS, FLOOR SUPPORT 
- [SDR UPS06446636](https://openairdocs.org/sdr/UPS06446636), Mar 13, 2006: SUPPORT. CRACKED. FX REAR BODY FAIRING SUPPORT FRAME FOUND CRACKED AT LT STA 1480 WL 118, CRACK LENGTH 3/8". FUSELAGE BS 1480 LT BODY FAIRING SUPPORT FRAME REPAIRED AS PER SRM 51
- [SDR UPS06446612](https://openairdocs.org/sdr/UPS06446612), Mar 13, 2006: SUPPORT. CORRODED. FX KEEL BEAM PANEL SUPPORT LOWER SURFACE FOUND CORROSION AT STA 1460 RBL 16 TO LBL 16 LWR SURFACE. CORROSION BLEND OUT 0.050" BY 1.5" BY 20" EXCEED SRM 53-10-01
- [SDR UPS06446575](https://openairdocs.org/sdr/UPS06446575), Mar 13, 2006: SUPPORT. CORRODED. KEEL BEAM PANEL SUPPORT LOWER SURFACE FOUND CORROSION AT STA 1437 RBL 16" TO LBL 16". CORROSION BLEND OUT 0.022" BY 1" BY 20" EXCEED SRM 53-10-01 FIG 1 LIMITS, 
- [SDR UPS06446573](https://openairdocs.org/sdr/UPS06446573), Mar 13, 2006: SUPPORT. CORRODED. KEEL BEAM PANEL SUPPORT LOWER SURFACE FOUND CORROSION AT STA 1395 RBL 4 TO RBL 16. CORROSION BLEND OUT 0.036" BY 1.5" BY 10" EXCEED SRM LIMIT. SUPPORT REPLACED 
- [SDR UPS06446570](https://openairdocs.org/sdr/UPS06446570), Mar 13, 2006: SUPPORT. CORRODED. KEELBEAM PANEL SUPPORT LOWER SURFACE FOUND CORROSION AT BS 1427 RBL 16 TO LBL16. CORROSION BLEND OUT 0.050" BY 2" BY 20" EXCEED SRM LIMIT. SUPPORT REPAIRED AND 
- [SDR UPS06446498](https://openairdocs.org/sdr/UPS06446498), Mar 13, 2006: WEB. CRACKED. INSPECTION TYPE:C NWW, TOP PANEL WEB BS 269 LBL10 CRACK INDICATION FOUND APPROX 1" LENGTH. NWW TOP PANEL WEB REPAIRED AT BS266-277 LBL5-15 AREA AS PER SRM 53-10
- [SDR UPS06446485](https://openairdocs.org/sdr/UPS06446485), Mar 13, 2006: FRAME. CRACKED. INSPECTION TYPE:C FX REAR BODY FAIRING SUPPORT FRAME FOUND CRACKED AT RT STA 1480 WL118, CRACK LENGTH 7/16". FX BS1480 BODY FAIRING SUPPORT FRAME REPAIRED AS PE
- [SDR UPS06446472](https://openairdocs.org/sdr/UPS06446472), Mar 13, 2006: SUPPORT. CRACKED. INSPECTION TYPE:C NWW LT SIDEWALL PANEL BS305 WL150 1EA FASTENERS HOLE SUPPORT CRACK, CRACK LENGTH 1/16". NWW LHS SIDEWALL PANEL REPAIRED AT BS302-310.5 WL143-1
- [SDR UPS06446596](https://openairdocs.org/sdr/UPS06446596), Mar 12, 2006: CARGO TRACK. CORRODED. BS 1640-1660 RBL 11 TIE DOWN TRACK I/B FLANGE FOUND CORRODED. CORROSION BLEND OUT 0.024" BY 3/4" BY 1.5" EXCEED SRM LIMIT. BS 1620 TO BS 1750 RBL 11 TRACK REPAI
- [SDR UPS06446595](https://openairdocs.org/sdr/UPS06446595), Mar 12, 2006: FLOOR SUPPORT. CORRODED. BS 1540-1580 LBL116 LONGITUDINAL FLOOR SUPPORT CORRODED. CORROSION BLEND OUT 0.055" BY 0.25" BY 1" EXCEED SRM LIMIT. FLOOR SUPPORT REPAIRED AS PER SRM 51-40-04 

All 468: https://openairdocs.org/deregistered/N681UP-2011-12-08/reports.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB BFO92IA046](https://openairdocs.org/ntsb/BFO92IA046), Mar 19, 1992: Boeing 747-123 (N681UP), Louisville, KY, incident, minor damage. Probable cause: INADEQUATE OBSTACLE CLEARANCE, WHICH RESULTED IN ON GROUND COLLISION WITH A BLAST FENCE. CONTRIBUTING WAS INADEQUATE INSTRUCTION FROM GROUND PERSONNEL.

## FAA accident and incident reports (3)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 19940919038919I](https://openairdocs.org/incident/19940919038919I), Sep 19, 1994: Boeing 747121 (N681UP), Portland, OR, Minor damage. Hydraulic failure on approach. Landed ok. Flex line at trunnion leaked. Powered steering. Bogie tilt damaged.
- [Incident 19920927044029I](https://openairdocs.org/incident/19920927044029I), Sep 27, 1992: Boeing 747121 (N681UP), Ontario, CA, Minor damage. Unable to maintain pressurization. Diverted to Ontario. Found L-1 aft crank arm door locking device had sheared.
- [Incident 19920319014969I](https://openairdocs.org/incident/19920319014969I), Mar 19, 1992: Boeing 747121 (N681UP), Louisville, KY, Minor damage. Wing tip struck the blast fence while making a turn. Under the direction of a marshaller.

---
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.