# JASC 5531: Vertical Stabilizer, Spar/Rib

- Type: JASC system/component code (FAA)
- ATA chapter: 55 Stabilizers
- Title in the code table: VERTICAL STABILIZER, SPAR/RIB STRUCT.
- Service difficulty reports: 1,233
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=51
- Page: https://openairdocs.org/jasc/5531

## What it covers

For specific reports of spars or ribs on the vertical stabilizer.

## Service difficulty reports (1,233, newest 50)

- [SDR 2026F00213](https://openairdocs.org/sdr/2026F00213), Sep 23, 2026: Gulstm 680. SPAR CAP. CORRODED. CORROSION, VERTICAL STABILIZER, LH AFT SPAR CAP, VFS 116 - VFS 121. ACCOMPLISHED TEXTRON AVIATION FIELD REPAIR FR-680-02 (N315QS)
- [SDR NI6R202608270069](https://openairdocs.org/sdr/NI6R202608270069), Aug 27, 2026: Gulstm 690A. RIB. CRACKED. WHILE PERFORMING ZONE 4 INSPECTION OF SB 244 FOUND .5" CRACK IN VERTICAL WEB. (N690TG)
- [SDR SIMA20260817002](https://openairdocs.org/sdr/SIMA20260817002), Aug 17, 2026: Emb ERJ170100SU. RIB. CHAFED. VERTICAL STABILIZER RIB 14 HAS 2 CHAFED SPOTS. (MAJOR REPAIR) REMOVED AND REPLACED VERTICAL STABILIZER RIB 14 IAW SRM 51 (N782SM)
- [SDR VNAA2026081322601](https://openairdocs.org/sdr/VNAA2026081322601), Aug 11, 2026: Cndair CL6002C10. SPAR. DAMAGED. REPAIR FOR MISALIGNED HOLES BETWEEN VERTICAL STABILIZER SPARS AND AFT FUSELAGE FRAMES, COMPLIED WITH ALL STEPS OF REO 67 (N529EA)
- [SDR SWAA2026090143559](https://openairdocs.org/sdr/SWAA2026090143559), Aug 8, 2026: Boeing 7377H4. RIB. CRACKED. CRACK ACCESS PANEL 321A LEADING EDGE RIB 8 ON VERTICAL STAB. REPLACED THE RIB AND FASTENERS AT IAW SRM 51-40-02-0G, DWG  (N954WN)
- [SDR SWAA2026090875219](https://openairdocs.org/sdr/SWAA2026090875219), Aug 7, 2026: Boeing 7378H4. RIB. CRACKED. CRACK RIB 8 ON ACCESS PANEL 321A AT VERTICAL STABILIZER. REPLACED THE RIB IAW SRM 51-40-02, SRM 51-1002, ITEM 9, DWG 147 (N8652B)
- [SDR SWAA2026081787560](https://openairdocs.org/sdr/SWAA2026081787560), Jul 23, 2026: Boeing 7377H4. RIB. CRACKED. CRACK ACCESS PANEL 321A LEADING EDGE RIB 8 VERTICAL STABILIZER 2026-443094 REPLACED RIB ASSY 8 AND FASTENERS OF THE ACCE (N952WN)
- [SDR HNAA2026082000743](https://openairdocs.org/sdr/HNAA2026082000743), Jul 16, 2026: Emb EMB145LR. RIB. CRACKED. VERTICAL STAB TRAILING EDGE UPPER RIB CRACKED. REPAIRED IAW ETD2026-145-012759 AND EO1-55-26-0354 (N939AE)
- [SDR SWAA2026072046075](https://openairdocs.org/sdr/SWAA2026072046075), Jun 29, 2026: Boeing 7377H4. RIB. CRACKED. CRACKED ACCESS PANEL 321A RIB 8 AT VERTICAL STAB. REPLACED RIB 8 LOC ACCESS PANEL 321A VERTICAL STAB IAW SRM 51-40-02, D (N950WN)
- [SDR SWAA2026062211588](https://openairdocs.org/sdr/SWAA2026062211588), Jun 11, 2026: Boeing 7377H4. RIB. CRACKED. UPON INSTALL OF DORSAL FIN; FOUND FORWARD MOUNT POINT(S) BRACKET CRACKED. APPLIED ALODINE IAW SRM 51-20-01. REMOVED CRAC (N478WN)
- [SDR REXA2026070301036](https://openairdocs.org/sdr/REXA2026070301036), Apr 30, 2026: Cndair CL6002D24. FRAME SPLICE. CRACKED. CRACK ON FRAME SPLICE AT 31.87% AND STGR 2L TO VERTICAL STABILIZER REAR SPAR DATUM, ON AFT ACCESSORIES COMPARTMENT. FRAM (N927XJ)
- [SDR DALA2026051703030](https://openairdocs.org/sdr/DALA2026051703030), Apr 29, 2026: Boeing 717200. SPAR CAP. NOT REPORTED. AD 2018-10-18 AMOC APPROVAL REQUIRES SPAR CAPS ETHF OPEN HOLE. ACCOMPLISH ERA 633126-14AD (1568579) (AIRCRAFT GROUNDED) (N990AT)
- [SDR DALA2026050502823](https://openairdocs.org/sdr/DALA2026050502823), Apr 29, 2026: Boeing 717200. SPAR CAP. NOT REPORTED. AMOC REQUIRED FOR ERA 583922-14AD REV B. AD 2018-10-08, VERTICAL STAB RH SPAR CAP. REPAIRED PER ER/A 00-583922. (1571590 (N933AT)
- [SDR JIKA2026051901](https://openairdocs.org/sdr/JIKA2026051901), Apr 27, 2026: Beech 1900C. SPAR ANGLE. CORRODED. DURING AN EVENT 6 SCHEDULED INSPECTION OF BEECHCRAFT MODEL 1900C AIRCRAFT N31703 (SERIAL NUMBER UB-10), PDX MAINTENANCE  (N31703)
- [SDR 2026F00069](https://openairdocs.org/sdr/2026F00069), Apr 10, 2026: Cessna 680A. SPAR. CORRODED. FOUND 2 AREAS OF CORROSION ON VERTICAL STAB AFT SPAR LH CLIP. MECHANICALLY REMOVED CORROSION VERTICAL STAB LEFT AFT SPAR (N317Q)
- [SDR SWAA2026042882450](https://openairdocs.org/sdr/SWAA2026042882450), Mar 23, 2026: Boeing 7378H4. RIB. CRACKED. CRACKED RIB NR 8 LOCATED STRUCTURE OF DORSAL FIN ACCESS PANEL 321A. REPLACED RIB NR 8 LOCATED STRUCTURE OF DORSAL FIN AC (N8640D)
- [SDR DALA2026032401970](https://openairdocs.org/sdr/DALA2026032401970), Mar 23, 2026: Boeing 767432ER. SPAR WEB. CRACKED. VERTICAL STABILIZER AUXILIARY SPAR WEB 30IN BELOW 321D LWR EDGE FOUND CRACK. REPAIRED AS PER PRI 632961-14 (1507497) (N831MH)
- [SDR DALA2026022601375](https://openairdocs.org/sdr/DALA2026022601375), Feb 24, 2026: Airbus BD5001A10. RIB. DAMAGED. DURING REPAIR OF LOG 8456712 FOUND HINGE RIB 1, HINGE RIB 2,AND LWR CLOSURE RIB DAMAGED. WILL REQUIRE REPLACEMENT. REPAI (N106DU)
- [SDR CALA2026011612997](https://openairdocs.org/sdr/CALA2026011612997), Jan 15, 2026: Boeing 737824. SHIM. MIGRATED. VERTICAL STAB LE SIDE INBD REAR SPAR FITTING VSS 1088 HAS A MIGRATING SHIM FROM BETWEEN THE BULKHEAD FITTING AND THE SPA (N54241)
- [SDR CALA2026011612992](https://openairdocs.org/sdr/CALA2026011612992), Jan 14, 2026: Boeing 737824. SPAR. CORRODED. VERTICAL STAB RT SIDE OTBD REAR SPAR FITTING VSS 1088 HAS A MIGRATING SHIM FROM BETWEEN THE BULKHEAD FITTING AND THE SPA (N54241)
- [SDR DALA2025101707595](https://openairdocs.org/sdr/DALA2025101707595), Oct 15, 2025: Boeing 717200. SPAR CAP. CRACKED. SHIP 9506 CRACK WAS FOUND ON HOLE 6 HRS AT STA ZFS=51.267 APROX. FRONT SPAR CAP FORWARD FLANGE VERTICAL STABILIZER LH SI (N946AT)
- [SDR CALA2025080407242](https://openairdocs.org/sdr/CALA2025080407242), Aug 1, 2025: Boeing 737824. RIB. GOUGED. MULTIPLE GOUGES FOUND ON VERTICAL FIN L/E FIXED RIB LE HSS 1007.65). REMOVED AND REPLACED VERTICAL FIN L/E FIXED RIB IAW (N17244)
- [SDR CALA2025070806337](https://openairdocs.org/sdr/CALA2025070806337), Jul 6, 2025: Boeing 737824. RIB. WORN. WEAR FOUND AT RIB FIXED LEADING EDGE (FRONT VERTICAL STABILIZER RIB MATTING SURFACE TO THE VERTICAL FIN, 321A, AFT SEAL) (N17229)
- [SDR 9WGA2025063054519](https://openairdocs.org/sdr/9WGA2025063054519), May 27, 2025: Doug MD11F. SPAR. CORRODED. DURING HEAVY CHECK SPARS LOWER VERTICAL STABILIZER INTERNAL STRUCTURE LH SIDE UPPER AREA NEAR STA 1986 THROUGH ACCESS 36 (N545JN)
- [SDR 9WGA2025063054518](https://openairdocs.org/sdr/9WGA2025063054518), May 27, 2025: Doug MD11F. SPAR. CORRODED. DURING HEAVY CHECK SPARS LOWER VERTICAL STABILIZER INTERNAL STRUCTURE LOWER SECTION BETWEEN STA 1927 AND STA 2486 ACCESS (N545JN)
- [SDR SWAA2025061675326](https://openairdocs.org/sdr/SWAA2025061675326), May 26, 2025: Boeing 7377H4. RIB. CRACKED. CRACK ACCESS PANEL 321A LOCATED ON RIB #8 ASSY AT VERTICAL STABILIZER. REPLACED RIB #8 LOCATED ON ACCESS PANEL 321A AT V (N940WN)
- [SDR HNAA2025060600400](https://openairdocs.org/sdr/HNAA2025060600400), May 14, 2025: Emb EMB145LR. SPAR. CRACKED. 53-2283 BOTTOM VERTICAL STAB, AFT OF SPAR 3, RH LWR PROFILE CRACKED . REPAIRED IAW ETD2025-145-921570 AND EO1-55-25-0192 (N695AE)
- [SDR SWAA2025060970159](https://openairdocs.org/sdr/SWAA2025060970159), May 12, 2025: Boeing 7377H4. RIB. CRACKED. CRACK RIB LOCATED ACCESS PANEL 321A AT VERTICAL STABILIZER 2025-310176<[01] TOOL USED: TEMPERATURE CONTROLLED: P/N: P301 (N942WN)
- [SDR CALA2025042104043](https://openairdocs.org/sdr/CALA2025042104043), Apr 12, 2025: Boeing 737824. RIB. CRACKED. VERTICAL STABILIZER HINGE RIB AT RUDDER STATION 56 .48 (17SA1204) IS CRACKED. REPAIRED VERTICAL STAB T/E HINGE RIB IAW H (N12238)
- [SDR SWAA2025040705836](https://openairdocs.org/sdr/SWAA2025040705836), Mar 15, 2025: Boeing 7377H4. RIB. CRACKED. CRACK RIB 8 ON ACCESS PANEL 321A AT VERTICAL STABILIZER 2025-203809<[01] TOOLS USED: TEMPERATURE CONTROLLER: P/N: P3015G (N939WN)
- [SDR JJBA20250213023](https://openairdocs.org/sdr/JJBA20250213023), Feb 7, 2025: Emb EMB145XR. SPAR. CRACKED. VERT STAB AFT OF REAR SPAR 3, LH SKIN UPPER AND LOWER PROFILE CRACKED. REMOVED AND REPLACED (N14198)
- [SDR 2024F00295](https://openairdocs.org/sdr/2024F00295), Nov 20, 2024: Gulstm 680. SPAR. CHAFED. WHILE ACCOMPLISHING ELEVATOR TRAVEL CHECKS FOUND ELEVATOR CONTROL HORNS HITTING HILOCKS PREVENTING FULL TRAVEL, NEED TO  (N370QS)
- [SDR 2024FA0000832](https://openairdocs.org/sdr/2024FA0000832), Nov 12, 2024: Cessna 680CE. SPAR. CORRODED. REPAIRED 2 AREAS OF CORROSION ON VERTICAL STAB AFT SPAR AFT FACE ON LH AND RH SPAR CLIPS, LH SIDE APX 15" BELOW MIDDLE R (N396QS)
- [SDR AALA202410037311](https://openairdocs.org/sdr/AALA202410037311), Sep 26, 2024: Boeing 737823. RIB. WORN. AIRCRAFT IN BASE MAINTENANCE: VERTICAL STABILIZER FIXED LEADING EDGE CLOSE OUT RIB WORN. LOCATED AT STA 1006 FROM LBL 14 (N953AN)
- [SDR SWAA2024090625582](https://openairdocs.org/sdr/SWAA2024090625582), Aug 13, 2024: Boeing 7377H4. RIB. CRACKED. DORSAL FIM MOST FWD RIB IS CRACKED<[01] REMOVED DAMAGED FWD RIB FROM DORSAL FIN REF. SRM 51-40-02-0G-0.<BR>LOCATED AND D (N930WN)
- [SDR HNAA2024091100758](https://openairdocs.org/sdr/HNAA2024091100758), Aug 7, 2024: Emb EMB145LR. SPAR. CHAFED. 55-2388 BOTTOM OF VETRICAL STAB BOTH LIPS CHAFED ON FWD OF FRONT SPAR 1. REPAIRED IAW EO1-05-24-0458 (N645AE)
- [SDR CALA2024071502042](https://openairdocs.org/sdr/CALA2024071502042), Jul 13, 2024: Airbus A319132. RIB. DAMAGED. (A3NB-55-3-6022) NO DOT-VERTICAL STAB HINGE ARM TO RUDDER HINGE ARM FITTING 2 EA ATACHMENT HOLES ELONGATED AS MARKED.()  (N897UA)
- [SDR SWIA20240711](https://openairdocs.org/sdr/SWIA20240711), Jul 11, 2024: Cndair CL6002C10. SPAR. GOUGED. VERTICAL STAB AFT SPAR - FITTING FOR RUDDER MIDDLE LOWER HINGE - UPR SURFACE GOUGED. REMOVED DAMAGE ON VERTICAL STAB AFT (N752EV)
- [SDR HNAA2024091200816](https://openairdocs.org/sdr/HNAA2024091200816), Jul 3, 2024: Emb EMB145LR. RIB. CRACKED. VERTICAL STAB AFT OF SPAR 3 LOWER RIB CRACKED. INSTALLED NEW RIB IAW SRM 51-40-02. (N686AE)
- [SDR JGVR20240703001](https://openairdocs.org/sdr/JGVR20240703001), Jul 3, 2024: Cessna 680CE. SPAR CAP. CORRODED. BLENDED TWO CORRODED AREAS OF THE RH AFT SPAR CAP OF THE VERTICAL STABILIZER, PERFORMED NDT AND REPORTED FOR REPAIR DISP (N369QS)
- [SDR JGVR20240626003](https://openairdocs.org/sdr/JGVR20240626003), Jun 26, 2024: Cessna 680CE. SPAR CAP. CORRODED. REPAIRED SEVERAL CORRODED AREAS ON THE VERTICAL STABILIZER AFT SPAR RH CAP BY BLENDING, PERFORMING NDT, REPORTING FOR RE (N311QS)
- [SDR A6WA202406138811](https://openairdocs.org/sdr/A6WA202406138811), Jun 13, 2024: Cndair CL6002B19. RIB. CHAFED. THREE (3) AREAS OF CHAFING DAMAGE NOTED ON RIB 9 OF VERTICAL STABILIZER UPPER SECTION. AREAS WERE BLENDED PER SUPPLEMENT (N466AW)
- [SDR JGVR20240422001](https://openairdocs.org/sdr/JGVR20240422001), Apr 22, 2024: Cessna 680SOV. SPAR. CORRODED. EXFOLIATION CORROSION FOUND ON THE LH AND RH LOWER VERTICAL SPAR CAPS. ADDITIONAL TIME FOR REASSEMBLY OF THE VERT STAB R (N369QS)
- [SDR 2024FA0000331](https://openairdocs.org/sdr/2024FA0000331), Apr 22, 2024: SPAR. CORRODED. EXFOLIATION CORROSION FOUND ON THE LH AND RH LOWER VERTICAL SPAR CAPS. (N369QS)
- [SDR SWAA2024050976301](https://openairdocs.org/sdr/SWAA2024050976301), Apr 18, 2024: Boeing 7377H4. RIB. CRACKED. VERTICAL STAB L/E ACCESS PANEL HAS CRACK AT RIB #9 FROM THE TOP<[01] ***SUMMARY***<BR>REMOVED PAINT ON VERTICAL STAB L/E (N472WN)
- [SDR SWAA2024050974466](https://openairdocs.org/sdr/SWAA2024050974466), Apr 13, 2024: Boeing 7377H4. RIB. CRACKED. DORSAL FIN PANEL 321A #1 RIB INTERNAL AREA HAS CRACKER. DORSAL FIN (PANEL 321A) #1 RIB (INTERNAL) CRACKED.<[01] REMOVED  (N923WN)
- [SDR AALA202404093423](https://openairdocs.org/sdr/AALA202404093423), Mar 22, 2024: Boeing 737823. RIB. WORN. AIRCRAFT IN BASE MAINTENANCE: WEAR MARKS ON VERTICAL STABILIZER RIB AT BS 1016, WL 308. REPLACED RIB PER AARD 51-00-05-1 (N940AN)
- [SDR SWAA2024041062373](https://openairdocs.org/sdr/SWAA2024041062373), Mar 13, 2024: Boeing 7377H4. RIB. CRACKED. FOUND CRACK 3/4' ON VERTICAL DORSAL FIN AT FOWARD RIP; SEE DOT # 49<[01] REMOVED AND REPLACED FWD RIB AT VERTICAL DORSAL (N920WN)
- [SDR DALA2024030603085](https://openairdocs.org/sdr/DALA2024030603085), Mar 4, 2024: Boeing 737832. SPAR. CORRODED. (LOG 0229818) STABILIZER VERTICAL FIN FRONT SPAR FITTING, RH SIDE BOLT WITH CORROSION. RH SIDE BOLT WITH CORROSION WAS R (N390DA)
- [SDR JGVR20240212001](https://openairdocs.org/sdr/JGVR20240212001), Feb 12, 2024: Cessna 680SOV. SPAR. CORRODED. FOUND 2 SPOTS OF CORROSION ON AFT VERTICAL SPAR. FOUND DURING TASK 55-30-00-2200 DURING CORROSION BLEND OUT, FOUND CORRO (N381QS)

All 1,233: https://openairdocs.org/jasc/5531/reports.md

## Other codes in chapter 55

- [JASC 5500](https://openairdocs.org/jasc/5500): Empennage Structure (490 reports)
- [JASC 5510](https://openairdocs.org/jasc/5510): Horizontal Stabilizer Structure (5,958 reports)
- [JASC 5511](https://openairdocs.org/jasc/5511): Horizontal Stabilizer, Spar/Rib (6,457 reports)
- [JASC 5512](https://openairdocs.org/jasc/5512): Horizontal Stabilizer, Plate/Skin (7,882 reports)
- [JASC 5513](https://openairdocs.org/jasc/5513): Horizontal Stabilizer, Tab Structure (97 reports)
- [JASC 5514](https://openairdocs.org/jasc/5514): Horizontal Stabilizer Miscellaneous Structure (2,781 reports)
- [JASC 5520](https://openairdocs.org/jasc/5520): Elevator Structure (5,383 reports)
- [JASC 5521](https://openairdocs.org/jasc/5521): Elevator, Spar/Rib (520 reports)
- [JASC 5522](https://openairdocs.org/jasc/5522): Elevator, Plate/Skin (3,271 reports)
- [JASC 5523](https://openairdocs.org/jasc/5523): Elevator, Tab Structure (1,033 reports)
- [JASC 5524](https://openairdocs.org/jasc/5524): Elevator Miscellaneous Structure (322 reports)
- [JASC 5530](https://openairdocs.org/jasc/5530): Vertical Stabilizer (2,534 reports)
- [JASC 5532](https://openairdocs.org/jasc/5532): Vertical Stabilizer, Plate/Skin (1,747 reports)
- [JASC 5533](https://openairdocs.org/jasc/5533): Ventral Structure (77 reports)
- [JASC 5534](https://openairdocs.org/jasc/5534): Vertical Stabilizer Miscellaneous Structure (816 reports)
- [JASC 5540](https://openairdocs.org/jasc/5540): Rudder Structure (1,901 reports)
- [JASC 5541](https://openairdocs.org/jasc/5541): Rudder, Spar/Rib (277 reports)
- [JASC 5542](https://openairdocs.org/jasc/5542): Rudder, Plate/Skin (1,372 reports)
- [JASC 5543](https://openairdocs.org/jasc/5543): Rudder, Tab Structure (196 reports)
- [JASC 5544](https://openairdocs.org/jasc/5544): Rudder Miscellaneous Structure (270 reports)
- [JASC 5550](https://openairdocs.org/jasc/5550): Empennage Flight Control Surfaces, Attach Fittings (66 reports)
- [JASC 5551](https://openairdocs.org/jasc/5551): Horizontal Stabilizer, Attach Fittings (672 reports)
- [JASC 5552](https://openairdocs.org/jasc/5552): Elevator Tab, Attach Fittings (222 reports)
- [JASC 5553](https://openairdocs.org/jasc/5553): Vertical Stabilizer, Attach Fittings (586 reports)
- [JASC 5554](https://openairdocs.org/jasc/5554): Rudder/Tab, Attach Fittings (132 reports)
- [JASC 5597](https://openairdocs.org/jasc/5597): Stabilizer System Wiring (14 reports)

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