# JASC 5413: Nacelle/Pylon, Longeron/Stringer

- Type: JASC system/component code (FAA)
- ATA chapter: 54 Nacelles/Pylons
- Title in the code table: NACELLE/PYLON, LONGERON/STRINGER
- Service difficulty reports: 220
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=49
- Page: https://openairdocs.org/jasc/5413

## What it covers

For reports pertaining to the longeron or stringer structure on the nacelles or pylons.

## Service difficulty reports (220, newest 50)

- [SDR IPXA2026082994280](https://openairdocs.org/sdr/IPXA2026082994280), Aug 21, 2026: Boeing 767316. LONGERON. CHAFED. CHAFED LONGERON, NR 1 ENG LT CORE COWL AFT LWR AREA. INSTALL A NEW LONGERON IAW SRM 51-40-02-0G, REV 132, AND CMM IPL 71 (N393UP)
- [SDR IPXA2026090180097](https://openairdocs.org/sdr/IPXA2026090180097), Jul 15, 2026: Airbus A300F4622R. LONGERON. CRACKED. PANEL 485 HAS A CRACK ON THE INTERNAL AFT SIDE. INSTALLED REPAIR PARTS IAW SRM-54-55-51, REPAIR 4. (N136UP)
- [SDR IPXA2026061568089](https://openairdocs.org/sdr/IPXA2026061568089), Jun 14, 2026: Airbus A300F4622R. LONGERON. CRACKED. NR 1 AFT LWR PYLON FAIRING LONGERONS CRACKED UNDER GUSSET PLATE. INSTALLED LONGERON SPLICE DOUBLERS, 2EA IAW SRM 51-40-2 (N144UP)
- [SDR IPXA2026060837004](https://openairdocs.org/sdr/IPXA2026060837004), May 31, 2026: Boeing 74744AF. LONGERON. CHAFED. CHAFED LONGERON, 3 ENG LT CORE COWL AFT LWR INNER SUPPORT. IAW SRM 51-40-02-0G, REV 106. REMOVED DAMAGE LONGERON IAW SRM (N577UP)
- [SDR IPXA2026042621981](https://openairdocs.org/sdr/IPXA2026042621981), Apr 22, 2026: Boeing 76734AF. LONGERON. CHAFED. CHAFED LONGERON, NR 1 ENG RT CORE COWL AFT LWR INNER CHORD EDGE AREA. INSTALLED A NEW LONGERON IAW SRM 51-40-02-0G REV.9 (N320UP)
- [SDR IPXA2026060649113](https://openairdocs.org/sdr/IPXA2026060649113), Apr 11, 2026: Airbus A300F4622R. LONGERON. GOUGED. NR 1 O/B T/R CORE AREA UPPER EDGE CLIP WORN. NR 1 O/B T/R CORE AREA UPPER EDGE CLIP WORN IT WAS REPAIRED IAW SREO-40521- (N141UP)
- [SDR CHIA202604109909](https://openairdocs.org/sdr/CHIA202604109909), Apr 10, 2026: Boeing 1072. STRINGER. CORRODED. DURING THE CORROSION INSPECTION OF THE AFT PYLON, FOUND CORROSION IN TWO PLACES ON STRINGER P/N 107S8319-16 AT APPROXIMA (N6682D)
- [SDR IPXA2026031245725](https://openairdocs.org/sdr/IPXA2026031245725), Mar 6, 2026: Boeing 76734AF. LONGERON. CHAFED. CHAFED LONGERON, NR 1 ENG LT CORE COWL LOWER LONGERON. INSTALLED NEW LONGERON IAW SRM 51-40-02-0G REV. 94 AND CMM IPL 71 (N348UP)
- [SDR IPXA2026013048711](https://openairdocs.org/sdr/IPXA2026013048711), Jan 30, 2026: Airbus A300F4622R. LONGERON. CRACKED. NR 1 PYLON LOWER AFT FAIRING 475AL FWD LONGERON HAS A CRACK AT FWD EDGE. STOP DRILLED CRACK 1.85" AFT OF LONGERON CRACK  (N134UP)
- [SDR SWAA2025101524076](https://openairdocs.org/sdr/SWAA2025101524076), Oct 13, 2025: Boeing 7378. STRINGER. CRACKED. DURING CONDITIONAL INSPECTION OF THE NR 1 ENGINE LT FAN COWL, FOUND A SECOND 3 INCH CRACK ON NR 4 AFT FAN COWL STRINGER. (N1806U)
- [SDR IPXA2025041591055](https://openairdocs.org/sdr/IPXA2025041591055), Apr 8, 2025: Airbus A300F4622R. LONGERON. DAMAGED. FAULT - STR - Z410 - AFT FAIRING PANEL 475AL I/B SIDE MOST AFT LONGERON HAS INCOMING ELGONAGTED HOLES ALONG SEAL PAST SR (N151UP)
- [SDR MTNA20250407001](https://openairdocs.org/sdr/MTNA20250407001), Apr 7, 2025: Textrn 408. LONGERON. CRACKED. WHILE PERFORMING FEDEX TECHNICAL BULLETIN 2023/12/28 FOUND #1 I/B SIDE HAS WHAT APPEARS TO BE A CRACK, FOUND CRACK TO PI (N408FE)
- [SDR HNAA2024121101183](https://openairdocs.org/sdr/HNAA2024121101183), Nov 3, 2024: Emb EMB145LR. LONGERON. CORRODED. F005173 CORROSION ON #1 ENGINE UPPER COWLING OB LONGERON CTR AND AFT EDGE. REPAIRED IAW ETD2024-145-031103 AND EO1-05-24 (N688AE)
- [SDR IPXA2024111323110](https://openairdocs.org/sdr/IPXA2024111323110), Oct 29, 2024: Airbus A300F4622R. LONGERON. CRACKED. #1 ENGINE OUTBOARD AFT LOWER PYLON UPPER LONGERON FORWARD END MISSING MATERIAL (CRACKED OUT). INSTALLED NEW LONGERON AT  (N131UP)
- [SDR IXXA202410032401](https://openairdocs.org/sdr/IXXA202410032401), Oct 3, 2024: Boeing 767319. STRINGER SPLICE. CRACKED. NUMBER 1 ENGINE PYLON I/B AFT FAIRING (STINGER) PANEL SUPPORT CRACKED (N331AZ)
- [SDR IXXA20241003006](https://openairdocs.org/sdr/IXXA20241003006), Aug 20, 2024: Boeing 767323. LONGERON. WORN. #1 PYLON PANEL 431AT 2 INNER LONGERONS ARE WORN. HAECO WO 320008 NON ROUTINE 40144 (N491AZ)
- [SDR IXXA2024080402](https://openairdocs.org/sdr/IXXA2024080402), Jun 25, 2024: Boeing 767323. LONGERON. CHAFED. #1 PYLON PANEL 431AT INNER FWD STRUCTURAL CHANNELS (PN 313T2100-86 AND 313T2100-82) ARE CHAFED ON THE FWD ENDS (N337AZ)
- [SDR UIEA2024061400520](https://openairdocs.org/sdr/UIEA2024061400520), Jun 24, 2024: Boeing 74747UF. STRINGER. CRACKED. #3 PYLON - I/B LOWER STRINGER CRACK FOUND AT MOST AFT END AREA (APPROX NAC STA 374) AS MARKED(<P>3 PYLON - I/B LOWER STR (N416MC)
- [SDR COEA2024013005767](https://openairdocs.org/sdr/COEA2024013005767), Jan 27, 2024: Textrn 408. LONGERON. CRACKED. WO 254814 NR 6 DISCREPANCY: DURING A SCHEDULED INSPECTION, A CRACK WAS DISCOVERED ON THE L/H NACELLE UNDER THE INERTIAL  (N767FX)
- [SDR CALA2022080301941](https://openairdocs.org/sdr/CALA2022080301941), Aug 3, 2022: Boeing 757200. SCREW. MISSING. PDA 3 SCREW MISSING FROM RT PYLON UPPER PANEL NEAR LEADING EGGE REPLACED MISSING SCREW (N17122)
- [SDR DALA2022071004816](https://openairdocs.org/sdr/DALA2022071004816), Jul 9, 2022: Boeing 757232. SUPPORT BRACKET. CRACKED. AIRCRAFT 0699, #1 PYLON, FWD. END, LH SIDE UPPER SKIN SUPPORT BRACKET IS CRACKED. I-75 DOT 002. CORECTIVE ACTION: ACCOMP (N699DL)
- [SDR MASA20211130590](https://openairdocs.org/sdr/MASA20211130590), Nov 30, 2021: Cndair CL600*. NONE. NONE. WEAR DAMAGE WAS FOUND ON THE L/H ENGINE AFT CORE COWL INBOARD SKIN, THE DAMAGE IS LOCATED AT THE INTERFACE OF THE PYLON  (N902FJ)
- [SDR HNAA2021061400259](https://openairdocs.org/sdr/HNAA2021061400259), May 25, 2021: Emb EMB145LR. LONGERON. CORRODED. CORROSION ON LH ENGINE UPPER COWLING OTBD LONGERON UNDER AFT HINGE FITTING ... SEE NRTC# E862591 FOR REPLACEMENT OF LH E (N635AE)
- [SDR HNAA2021061400258](https://openairdocs.org/sdr/HNAA2021061400258), May 25, 2021: Emb EMB145LR. LONGERON. CORRODED. CORROSION ON LH ENGINE UPPER COWLING OTBD LONGERON UNDER CENTER HINGE FITTING ... SEE NRTC # E862591 FOR REMOVAL AND REP (N635AE)
- [SDR IPXA2021060970341](https://openairdocs.org/sdr/IPXA2021060970341), May 15, 2021: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:A300#2 PYLON PANEL 485AL RH SIDE SEVERAL HOLES ELONGATEDREMOVED AND REPLACED UPPER LONGERON IAW SRM 51-4 (N134UP)
- [SDR IPXA2021060970337](https://openairdocs.org/sdr/IPXA2021060970337), May 15, 2021: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:A30#2 PYLON PANEL 485AL LH SIDE SEVERAL HOLES ELONGATEDREMOVED AND REPLACED UPPER LONGERON IAW SRM 51-40 (N134UP)
- [SDR IPXA2021061170443](https://openairdocs.org/sdr/IPXA2021061170443), May 12, 2021: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:CPANEL RACK LH PYLON AFT LOWER FAIRING 475AL LH UPPER EDGE 27EA FASTENER HOLES ELONGATEDREMOVED AND REPL (N134UP)
- [SDR IPXA2021060370102](https://openairdocs.org/sdr/IPXA2021060370102), May 12, 2021: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:CPANEL RACK LH PYLON AFT AFT LOWER FAIRING 475AL RH UPPER EDGE 25EA FASTENER HOLES ELONGATEDREMOVED AND  (N134UP)
- [SDR R61A2020121500873](https://openairdocs.org/sdr/R61A2020121500873), Nov 26, 2020: Emb ERJ170100LR. STRINGER. CRACKED. WHILE IN HEAVY CHECK, RT ENGINE AFT PYLON STRINGER 5 OUTBOARD SIDE CRACKED. REPAIRED ON AAR NRC 4500812-4000-0039 AND SR (N806MD)
- [SDR IPXA2020070357293](https://openairdocs.org/sdr/IPXA2020070357293), Jul 3, 2020: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:SEG NR 2 PYLON FAIRING 485AL MIDDLE LONGERON HAS ELONGATED HOLES IN ATTACH FLANGE. REMOVED AND INSTALLED (N126UP)
- [SDR IPXA2020070357294](https://openairdocs.org/sdr/IPXA2020070357294), Jul 3, 2020: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:SEG NR 1 PYLON FAIRING 475AL HAS ELONGATED HOLES IN I/B MIDDLE LONGERON ATTACH FLANGE. REMOVED AND INSTA (N126UP)
- [SDR IPXA2020062256803](https://openairdocs.org/sdr/IPXA2020062256803), Jun 20, 2020: Airbus A300F4622R. LONGERON. WORN. INSPECTION TYPE:SEG NR 2 PYLON FAIRING RT UPPER CENTER LONGERON HAS WORN HOLES. REMOVED & REPLACED IAW SRM 51-40-21. (N137UP)
- [SDR IPXA2020061056384](https://openairdocs.org/sdr/IPXA2020061056384), Jun 9, 2020: Airbus A300F4622R. LONGERON. DAMAGED. INSPECTION TYPE:C PYLON NR 1 LOWER AFT FAIRING 475AL UPPER EDGE 4EA FASTERNER HOLES ELONGATED. REMOVED AND INSTALLED NEW (N137UP)
- [SDR MASA2020041309005](https://openairdocs.org/sdr/MASA2020041309005), Apr 10, 2020: Cndair CL6002C10. LONGERON. CORRODED. R&R'D CORRODED LONGERON AT STGR 25RH BETWEEN FS333-FS3364 STGR 25R. (N509MJ)
- [SDR IPXA2020042454585](https://openairdocs.org/sdr/IPXA2020042454585), Mar 21, 2020: Airbus A300F4622R. LONGERON. WORN. INSPECTION TYPE:C#2 PYLON PNL 485AL HAS LH UPPER T-CHORD WITH WORN HOLESREMOVED UPPER T-CHORD LONGERON L/H IAW SRM 51-40 (N120UP)
- [SDR ABXA2020021409031](https://openairdocs.org/sdr/ABXA2020021409031), Feb 9, 2020: Boeing 767338. STRINGER. CORRODED. CRACKED STRINGER #1 PYLON AFT NACELLE STRUT FAIRING INBD LWR. THE AIRPLANE WAS GROUNDED. (N372CM)
- [SDR 7C7A2019080900509](https://openairdocs.org/sdr/7C7A2019080900509), Aug 9, 2019: Dhav DHC8106. LONGERON. CRACKED. CRACK DAMAGE TO RH NACELLE I/B UPPER NACELLE LONGERON P/N 85410209 AROUND EYE BOLT. (N891EA)
- [SDR 7C7A2019030900490](https://openairdocs.org/sdr/7C7A2019030900490), Mar 9, 2019: Dhav DHC8106. LONGERON. CRACKED. RCRACK IN LT NACELLE OB UPPER LONGERON 85410209 AT XN120.5. ECO 008.54-19.01, RD 8-54-4142, 7H-RW-32186. (N893EA)
- [SDR UIEA2017070801130](https://openairdocs.org/sdr/UIEA2017070801130), Jul 31, 2017: Boeing 76731B. LONGERON. CRACKED. NR 2 ENGINE, LT CORE COWL MOST AFT LONGERON FOUND CRACKED. THE LONGERON WAS REMOVED AND REPLACED IAW SRM 51-40-02, REV 1 (N1361A)
- [SDR AN0R2017629008](https://openairdocs.org/sdr/AN0R2017629008), May 4, 2017: Doug MD9030. SKIN. DELAMINATED. AREAS OF DAMAGE EXIST COMMON TO THE C DUCT BONDED ASSEMBLY, FWD AND AFT SKIN, INBOARD AND OUTBOARD SIDEWALL FWD AND AFT 
- [SDR CALA2016010894969](https://openairdocs.org/sdr/CALA2016010894969), Jan 6, 2016: Boeing 747451. STRINGER. DAMAGED. NUMBER 3 PYLON CAVITY LOWER STRINGER REPAIRED AT NAC STATION 363.53 TO 376.435. ACCOMPLISHED PERMANENT REPAIR IAW ECRA 5 (N105UA)
- [SDR ABXA20150710121](https://openairdocs.org/sdr/ABXA20150710121), Jul 10, 2015: Boeing 767232. LONGERON. CRACKED. NUMBER 2 ENG OTBD CORE COWL LOWER FRAME CRACKED BY NR 3 LATCH. REMOVED & REINSTALLED NR 3 LATCH & LOWER FRAME IAW SRM 51 (N745AX)
- [SDR S9BA20150005](https://openairdocs.org/sdr/S9BA20150005), Jun 21, 2015: Dhav DHC6300. LONGERON. CRACKED. LEFT NACELLE OTBD LONGERON CRACKED. REMOVED CRACKED LONGERON, LOCATED NEW LONGERON AND INSTALLED. REF AC 43.13-1B
- [SDR ABXA2014012611](https://openairdocs.org/sdr/ABXA2014012611), Jan 26, 2014: Boeing 767281. ANGLE. CRACKED. NUMBER 1 PYLON STRINGER HAS CRACKED INTERNAL Z ANGLE M PANEL. NR 1 PYLON STRINGER Z ANGLE ON PANEL 437BB IAW SRM 51-40-0 (N794AX)
- [SDR VGCA20140123002](https://openairdocs.org/sdr/VGCA20140123002), Jan 23, 2014: Cvac STC3405800. LONGERON. CORRODED. CORROSION ON NR 2 LONGERON INBD AT NACELLE. (N371FL)
- [SDR VGCA20140123001](https://openairdocs.org/sdr/VGCA20140123001), Jan 23, 2014: Cvac STC3405800. LONGERON. CORRODED. CORROSION ON NR 2 LONGERON OTBD AT NACELLE STATION 117. (N371FL)
- [SDR ABXA20140120136](https://openairdocs.org/sdr/ABXA20140120136), Jan 20, 2014: Boeing 767281. STRINGER. CRACKED. STRINGER WEB HAS A CRACKED INTERNAL ANGLE INBD SIDE NR 1 ENG AFT PYLON. R & R INTERNAL ANGLE IAW SRM 51-40-02 PAR 7. SDR (N773AX)
- [SDR HNAA2013111500580](https://openairdocs.org/sdr/HNAA2013111500580), Nov 15, 2013: Dhav DHC8311. LONGERON. CRACKED. UPPER INBD LEFT LONGERON IS CRACKED ON OUTER RADIUS. REPAIRED DAMAGE IAW EO8-54-13-0664. (N327EN)
- [SDR S9BA2013111500007](https://openairdocs.org/sdr/S9BA2013111500007), Nov 13, 2013: Dhav DHC6300. LONGERON. CRACKED. RT NACELLE INBD LONGERON CRACKED. R & R RT NACELLE INBD LONGERON IAW SRM CHAPTER 54 AND AC 43.1B-1B.
- [SDR SWIA201335519](https://openairdocs.org/sdr/SWIA201335519), Nov 1, 2013: Emb EMB120ER. STRINGER. CRACKED. LT NACELLE GEAR WELL OTBD HORIZONTAL FRAME CRACKED. C-CHECK REPAIRED LT NACELLE, OTBD STRINGER WEB 3L IAW SRM. (N297SW)

All 220: https://openairdocs.org/jasc/5413/reports.md

## Other codes in chapter 54

- [JASC 5400](https://openairdocs.org/jasc/5400): Nacelle/Pylon Structure (1,907 reports)
- [JASC 5410](https://openairdocs.org/jasc/5410): Nacelle/Pylon, Main Frame (4,099 reports)
- [JASC 5411](https://openairdocs.org/jasc/5411): Nacelle/Pylon, Frame/Spar/Rib (1,453 reports)
- [JASC 5412](https://openairdocs.org/jasc/5412): Nacelle/Pylon, Bulkhead/Firewall (1,086 reports)
- [JASC 5414](https://openairdocs.org/jasc/5414): Nacelle/Pylon, Plate/Skin (4,353 reports)
- [JASC 5415](https://openairdocs.org/jasc/5415): Nacelle/Pylon, Attach Fittings (1,305 reports)
- [JASC 5420](https://openairdocs.org/jasc/5420): Nacelle/Pylon Miscellaneous Structure (3,946 reports)
- [JASC 5497](https://openairdocs.org/jasc/5497): Nacelle/Pylon System Wiring (53 reports)

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