# JASC 5410: Nacelle/Pylon, Main Frame

- Type: JASC system/component code (FAA)
- ATA chapter: 54 Nacelles/Pylons
- Title in the code table: NACELLE/PYLON, MAIN FRAME
- Service difficulty reports: 4,099
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=49
- Page: https://openairdocs.org/jasc/5410

## What it covers

For reports of the structure which houses and supports powerplants. Includes the firewall and all structure aft on multi-engine aircraft and firewalls on single engine aircraft. Does not include engine mounting or cowling.

## Service difficulty reports (4,099, newest 50)

- [SDR HYIA20261022001](https://openairdocs.org/sdr/HYIA20261022001), Oct 20, 2026: Cessna 402C. BEAM. CRACKED. DURING SCHEDULED ENGINE BEAM REPLACEMENT, UPON REMOVAL OF ENGINE BEAM A CRACK WAS VISUALLY IDENTIFIED ON THE INBOARD FAC (N160PB)
- [SDR FDEA202610201624](https://openairdocs.org/sdr/FDEA202610201624), Oct 20, 2026: Boeing 757204. STRUCTURE. CORRODED. NR 2 ENGINE PYLON STRUT, OTBD LOWER STRUCTURE NAC S 146.675 FOUND CORRODED. (N923FD)
- [SDR CALA2026102120486](https://openairdocs.org/sdr/CALA2026102120486), Oct 17, 2026: Boeing 757224. ACCESS DOOR. MISSING. NR 1 ENG OIL FILLER ACCESS DOOR FOUND MISSING DURING WALK AROUND. THE OIL FILLER ACCESS DOOR WAS REPLACED IAW AMM 72-00- (N33103)
- [SDR FDEA202610151595](https://openairdocs.org/sdr/FDEA202610151595), Oct 15, 2026: Boeing 757204. STRUT. CORRODED. ENG #2 PYLON STRUT INBD LOWER CHORD STA 144.425 CORROSION. THIS DISCREPANCY WAS ACCOMPLISHED ON EA # F-5430-T0389069 P1  (N923FD)
- [SDR EE4Y2026100525064](https://openairdocs.org/sdr/EE4Y2026100525064), Oct 5, 2026: Emb ERJ190100IGW. HEAT SHIELD. CRACKED. DURING INSPECTION, IT WAS NOTED THAT ENGINE #1 PYLON AFT FAIRING HEAT SHIELD SKIN #8 HAD AN EXISTING REPAIR AT THE AFT L (N306JB)
- [SDR EE4Y2026100525063](https://openairdocs.org/sdr/EE4Y2026100525063), Oct 5, 2026: Emb ERJ190100IGW. LINK. CORRODED. DURING THE ACCOMPLISHMENT OF REF. A, THE PYLON LOWER LINK FITTING OUTBOARD LUG FIXED BUSHINGS WERE FOUND WITH WEAR. AFTE (N306JB)
- [SDR IPXA2026101387189](https://openairdocs.org/sdr/IPXA2026101387189), Oct 4, 2026: Boeing 767346. HINGE. WORN. RT AFT FAIRING DOOR NR 4 HINGE WORN , NR 2 PYLON. REPAIR DAMAGE AREA I.A.W UPS EO-98882-REQ1 REV1. 2. REPLACED NEW HINGE (N364UP)
- [SDR CALA2026100620144](https://openairdocs.org/sdr/CALA2026100620144), Oct 3, 2026: Boeing 777222. DOOR. DAMAGED. RIGHT ENGINE NACELLE DRAIN ACCESS PANEL FOUND OPEN ON ARRIVAL. R & R DOOR ASSEMBLY IAW AMM 78-31-19. DOOR ADJUSTED AND O (N786UA)
- [SDR JR2R20261003051](https://openairdocs.org/sdr/JR2R20261003051), Oct 3, 2026: Emb ERJ170200LL. HEAT SHIELD. CHAFED. LEFT AFT PYLON FAIRING HEAT SHIELD HAS EVIDENCE OF CHAFING. REPAIRED PER ETD. (N85320)
- [SDR CALA2026100720169](https://openairdocs.org/sdr/CALA2026100720169), Oct 2, 2026: Boeing 757224. FITTING. CRACKED. NR 2 ENG PYLON NACELLE MID STRUCTURE BULKHEAD PP STA 174.30 RBL 9 WITH CRACK. ACCOMPISHED REPAIR ON #2 ENG PYLON MID-BUL (N17126)
- [SDR IPXA2026100639564](https://openairdocs.org/sdr/IPXA2026100639564), Oct 1, 2026: Airbus A300F4622R. PANEL. CRACKED. AFTER REMOVAL OF SEAL, FOUND PANEL 423BL CRACKED. INSTALLED DOUBLER ON PANEL 423BL IAW SRM 54-52-51-201-C1, PARAGRAPH D. (N158UP)
- [SDR CALA2026100520118](https://openairdocs.org/sdr/CALA2026100520118), Sep 30, 2026: Boeing 767322. DOOR. MISSING. PDA 2 MISSING ACCESS PANEL ON I/B NUMBER 2 ENGINE REPLACED MISSING ACCESS PANEL ON I/B ENGINE 2 REF IPC 54-53-01-17. AIR (N674UA)
- [SDR HYIA20261001001](https://openairdocs.org/sdr/HYIA20261001001), Sep 30, 2026: Cessna 402C. BEAM. CRACKED. DURING HIGH TIME ENGINE BEAM REPLACEMENT, UPON REMOVAL OF ENGINE BEAM A CRACK WAS VISUALLY IDENTIFIED ON THE INBOARD FAC (N290CA)
- [SDR 1Q2R2026093020063](https://openairdocs.org/sdr/1Q2R2026093020063), Sep 28, 2026: Cndair CL6002C10. LATCH. GOUGED. R/H ENGINE LATCH, BEAM LATCH, STRUCTURE IS GOUGED. PERFORMED PERMANENT REPAIR IN ACCORDANCE WITH RFTS-131113 REV. 0, AND (N706PS)
- [SDR YENA2026092500902](https://openairdocs.org/sdr/YENA2026092500902), Sep 24, 2026: Airbus A321271NX. RUB STRIP. DAMAGED. FLT 1621, LHR-BOS. (ETOPS) "DAMAGE FOUND ON ENG 2 FAN CASE RUB STRIP. DAMAGE OUT OF LIMITS PER AMM 72-21-01-220-802-A. D (N4080J)
- [SDR R61A2026092800289](https://openairdocs.org/sdr/R61A2026092800289), Sep 23, 2026: Emb ERJ170200LR. PANEL. MISSING. NR 1 PYLON PANEL MISSING UPON ARRIVAL. INSTALLED PYLON SIDE FAIRING PANEL (N402YX)
- [SDR DALA2026092305313](https://openairdocs.org/sdr/DALA2026092305313), Sep 22, 2026: Airbus A330941. BEARING. DAMAGED. NR 2 PYLON SPIGOT BEARING DAMAGE. REPAIRED PER ERA 636951-14. (1826757) AIRCRAFT WAS GROUNDED. (N415DX)
- [SDR DALA2026092305312](https://openairdocs.org/sdr/DALA2026092305312), Sep 22, 2026: Airbus A330941. BEARING. DAMAGED. NR 1 PYLON SPIGOT BEARING DAMAGE. REPAIRED PER ERA 636950-14. (1826456) AIRCRAFT WAS GROUNDED. (N415DX)
- [SDR DALA2026092305310](https://openairdocs.org/sdr/DALA2026092305310), Sep 22, 2026: Airbus A330941. FITTING. CORRODED. NR 1 PYLON, AFT SPIGOT FITTING TOP SURFACE HAS POWDERY SUBSTANCE RESEMBLING CORROSION. COMPLIED WITH ERA 636950-14 REV O (N415DX)
- [SDR CALA2026092519801](https://openairdocs.org/sdr/CALA2026092519801), Sep 21, 2026: Airbus A319131. PANEL. MISSING. FOUND NR 1 PYLON SECTION PANEL MISSING, REF IPC 54-57-22-07A, ITEM 90, DETERMINED TO BE CATEGORY 2 50.75 SQ-IN R & R THE (N818UA)
- [SDR YENA2026092300868](https://openairdocs.org/sdr/YENA2026092300868), Sep 21, 2026: Airbus A320232. SPIGOT. CORRODED. DURING HEAVY MAINTENANCE, RT PYLOHN RECEPTACLE FITTING AND SPIGOT BALL JOINT CORRODED. REMOVED AND REPLACED RECEPTACLE F (N588JB)
- [SDR YENA2026092300867](https://openairdocs.org/sdr/YENA2026092300867), Sep 21, 2026: Airbus A320232. BALL JOINT. RUSTED. DURING HEAVY MAINTENANCE, CORROSION RECEPTACLE FITTING AND SPIGOT BALL JOINT LT PYLON. REMOVED AND REPLACED RECEPTACLE F (N588JB)
- [SDR IPXA2026101834137](https://openairdocs.org/sdr/IPXA2026101834137), Sep 19, 2026: Airbus A300F4622R. PLATE. DAMAGED. PANEL 485AL FWD INNER AREA, LH UPPER LONGERON HAS WEAR DAMAGE WITH MATERIAL LOSS. REPLACED FAIRING ATTACH PLATE ON PANEL (N146UP)
- [SDR CALA2026092219662](https://openairdocs.org/sdr/CALA2026092219662), Sep 19, 2026: Airbus A319131. SEAL. CRACKED. RIGHT PYLON FWD INBD BLADE SEAL CRACKED. REMOVED AND REPLACED BLADE SEAL AT RT PYLON FWD INBD IAW SRM 51-42-11. (N836UA)
- [SDR YENA2026092100858](https://openairdocs.org/sdr/YENA2026092100858), Sep 19, 2026: Airbus A321271NX. TIE ROD. EXCESS PLAY. FLT 2220, LHR-JFK. (ETOPS) DURING T/C A320-29-10-00-220-004A ON W/O 1524471 FOUND LOWER HYDRAULIC INTER. TIE ROD ON ENG  (N4064J)
- [SDR YENA2026092100857](https://openairdocs.org/sdr/YENA2026092100857), Sep 19, 2026: Airbus A321271NX. TIE ROD. EXCESS PLAY. FLT 2220, LHR-JFK. (ETOPS) DURING T/C A320-29-10-00-220-004A ON W/O 1524471, FOUND UPPER HYDRAULIC INTER. TIE ROD ON ENG (N4064J)
- [SDR IPXA2026100102772](https://openairdocs.org/sdr/IPXA2026100102772), Sep 17, 2026: Airbus A300F4622R. PANEL. CRACKED. PANEL 423BL LOWER AREA WITH 2 CRACKS. REMOVED (IEA) SEAL AND SEAL RETAINER AT PANEL 423BL IAW SRM 51-40-21. REINSTALLED  (N158UP)
- [SDR IPXA2026092286713](https://openairdocs.org/sdr/IPXA2026092286713), Sep 17, 2026: Boeing 76734AF. COWLING. CRACKED. CRACKED SKIN, NR 1 ENG RT CORE COWL LOWER FWD SKIN NEAR NO.1 LATCH. PERFORM REPAIR I.A.W UPS EO-98690-REQ1 REV.1. (N355UP)
- [SDR IPXA2026092289443](https://openairdocs.org/sdr/IPXA2026092289443), Sep 17, 2026: Boeing 76734AF. NOSE COWL. DENTED. DENTED NR 1 NOSE COWL INLET AT 7 O'CLOCK POSITION. BOND THE SPACER WITH FILM ADHESIVE CURED AT 250°F FOR 2 HOURS AND FI (N355UP)
- [SDR IPXA2026092290656](https://openairdocs.org/sdr/IPXA2026092290656), Sep 17, 2026: Boeing 76734AF. NOSE COWL. DENTED. DENTED NR 1 ENG NOSE COWL INLET AT 5 O'CLOCK POSITION. BOND THE SPACER WITH FILM ADHESIVE CURED AT 250°F FOR 2 HOURS AN (N355UP)
- [SDR IPXA2026092290813](https://openairdocs.org/sdr/IPXA2026092290813), Sep 17, 2026: Boeing 76734AF. NOSE COWL. DENTED. DENTED SKIN, NR 2 ENG NOSE COWL INNER BARREL NEAR 2:00 TO 6:00 POS. BOND THE SPACER WITH FILM ADHESIVE CURED AT 250°F F (N355UP)
- [SDR IPXA2026092290842](https://openairdocs.org/sdr/IPXA2026092290842), Sep 17, 2026: Boeing 76734AF. NOSE COWL. DENTED. DENTED NR 1 ENGINE NOSE COWL INLET AT 6 O'CLOCK POSITION. UT OUT THE DAMAGE AND CLEAN, MEASURE THE CUT OUT ( ‘ DIA : 0. (N355UP)
- [SDR IPXA2026102245620](https://openairdocs.org/sdr/IPXA2026102245620), Sep 15, 2026: Airbus A300F4622R. FAN COWL. CORRODED. NR 1 ENG.I/B FAN COWL INNER EDGE SEAL FAN COWL HAS SURFACE CORROSIONS AND DEEP WEAR. VERIFIED REMOVAL OF RUB STRIP (INNE (N146UP)
- [SDR AALA202609182187](https://openairdocs.org/sdr/AALA202609182187), Sep 15, 2026: Airbus A321231. HINGE FITTING. WORN. AIRCRAFT IN BASE MAINTENANCE: ENGINE 1 INBOARD FAN COWL FORWARD HINGE WORN - REPLACED HINGE FITTING PER CMM 71-13-00 (N901AA)
- [SDR SWAA2026091706067](https://openairdocs.org/sdr/SWAA2026091706067), Sep 13, 2026: Boeing 7378H4. INLET. CRACKED. OTS-#2 ENGINE INLET COWL CRACKED_ VERIFIED CRACK AND MARKED ENDS. CRACK MEASURES 3.0IN LONG. REF NDT PART 6 51-00-00. PR (N8632A)
- [SDR SWAA2026091483658](https://openairdocs.org/sdr/SWAA2026091483658), Sep 10, 2026: Boeing 7378. FAIRING. CRACKED. NR 1 ENGINE AFT FAIRING PLUME SUPPRESSOR CRACK, C/W EA 26-154-02465 (N8736J)
- [SDR WX0A2026090932951](https://openairdocs.org/sdr/WX0A2026090932951), Sep 9, 2026: Airbus A320214. HINGE. CORRODED. (AIRCRAFT NOT GROUNDED) (DEFECT DISCOVERED DURING AC HEAVY MX VISIT) NRC 4000-0010: 1205-06 ENGINE NR 2 PYLON OVERPRESSU (N206NV)
- [SDR SWAA2026091182854](https://openairdocs.org/sdr/SWAA2026091182854), Sep 7, 2026: Boeing 7377H4. SKIN. PEELING. FOUND ENG 1 OUTBOARD T/R INNER DUCT SKIN PEELING DAMAGE EXCEEDS ALLOWABLE LIMITS IAW SRM 54-30-01A-3. C/W PERMANENT REPA (N901WN)
- [SDR SWAA2026092374661](https://openairdocs.org/sdr/SWAA2026092374661), Sep 5, 2026: Boeing 7377H4. FAN COWL. DAMAGED. ELONGATED HOLE LOCATED ON OUTBOARD FAN COWL 0.500 INCH FROM FWD EDGE AND 3.375 INCH FROM LOWER EDGE AT ENGINE 1. EVALUAT (N259WN)
- [SDR SWAA2026090889890](https://openairdocs.org/sdr/SWAA2026090889890), Sep 3, 2026: Boeing 7377H4. STRUT. CRACKED. NR 1 ENGINE TRF NR 2 STRUT HAS A CRACK ON C2 MEASURING .400 AND A CRACK ON C1 MEASURING .800. OK TO CONTINUE ON 350 CYCL (N449WN)
- [SDR IPXA2026092823749](https://openairdocs.org/sdr/IPXA2026092823749), Sep 1, 2026: Airbus A300F4622R. FAIRING. CRACKED. CRACK ON #1 ENG AFT LWR PYLON FAIRING, LOWER SKIN. LOWER AFT FAIRING REMOVED AND INSTALLED ON MPC 400 T3F18E007EGD6. (N158UP)
- [SDR UIEA2026083000826](https://openairdocs.org/sdr/UIEA2026083000826), Sep 1, 2026: Boeing 747412F. FAIRING. DAMAGED. NR 2 PYLON AFT FAIRING FWD LWR FIXED FAIRING DRAIN INBD AND OTBD AREA FOUND SEVERAL RIVETS LOOSE. NR PYLON AFT FAIRING D (N489MC)
- [SDR VNAA2026083145](https://openairdocs.org/sdr/VNAA2026083145), Aug 31, 2026: Cndair CL6002C10. HINGE. BENT. LEFT ENGINE COWLING IS UNABLE TO BE OPENED DUE TO A DENTED HINGE LINE THAT WAS BENT UPON ARRIVAL . REPAIRED IAW REO 670- (N705PS)
- [SDR SWAA2026090180716](https://openairdocs.org/sdr/SWAA2026090180716), Aug 31, 2026: Boeing 7378. FAIRING. CRACKED. NR 1 ENGINE AFT FAIRING HEAT SHIELD PLUME SUPPRESSOR HAS A FIVE INCH CRACK 28 INCHES FORWARD OF AFT TIP. PERFORMED TIME  (N8733M)
- [SDR SWIA2026082977229](https://openairdocs.org/sdr/SWIA2026082977229), Aug 29, 2026: Emb ERJ170200LL. FRAME. CHAFED. CHAFING ON INBD OF FR 1 OF RT AFT PYLON FAIRING. REMOVED AND REPLACED RT AFT PYLON FR1 IAW SRM 51-40-02, & 51-40-08. (N280SY)
- [SDR FDEA202608281248](https://openairdocs.org/sdr/FDEA202608281248), Aug 28, 2026: Boeing 7572Q8. STRUT. CRACKED. NR 2 NACELLE STRUT, RIGHT SIDE SKIN, THROUGH ACCESS 443AR, SHOWS A CRACK WITH NO VISIBLE STOP HOLE. THIS ITEM HAS BEEN A (N993FD)
- [SDR IXXA2026082800002](https://openairdocs.org/sdr/IXXA2026082800002), Aug 28, 2026: Boeing 767223. COWLING. OUT OF TOLERANCE. NR 1 ENGINE INBD CORE COWL GAPS ARE OUT OF LIMITS ON TRAILING EDGE IAW AMM (N761CX)
- [SDR IXXA2026082800001](https://openairdocs.org/sdr/IXXA2026082800001), Aug 28, 2026: Boeing 767223. COWLING. OUT OF TOLERANCE. NR 1 ENGINE OTBD CORE COWL GAPS ARE OUT OF LIMITS ON TRAILING EDGE IAW AMM. (N761CX)
- [SDR IXXA20260919NKJ01](https://openairdocs.org/sdr/IXXA20260919NKJ01), Aug 27, 2026: Boeing 767323. COWLING. CRACKED. NUMBER 2 ENGINE OUTBOARD CORE COWL INTERNAL AREA #5 RIB/FRAME HAS CHAFING/WEAR MARKS (IS CRACKED) (N233AZ)
- [SDR IPXA2026090126837](https://openairdocs.org/sdr/IPXA2026090126837), Aug 26, 2026: Boeing 76734AF. BRACKET. CHAFED. CHAFED BRACKET, NR 1 ENG RT CORE COWL INNER OPEN ROD STOW AREA. REMOVED THE DAMAGE BRACKET IAW SRM 51-40-02-0G, REV 96.  (N305UP)

All 4,099: https://openairdocs.org/jasc/5410/reports.md

## Other codes in chapter 54

- [JASC 5400](https://openairdocs.org/jasc/5400): Nacelle/Pylon Structure (1,907 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 5413](https://openairdocs.org/jasc/5413): Nacelle/Pylon, Longeron/Stringer (220 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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