-------------------------------------- AOG ALERTS NOTIFICATION: 2025-518 -------------------------------------- AOG ID: 2025-518 AOG Status: Open Event Type: AOG Event Source: Line Station AOG Name: Airbus A321 in Istanbul Nose Gear Steering Fault --------------------------------------
IMPACT SUMMARY: -------------------------------------- Resolution Speed: Critical Impact Type: Revenue Flight Flights Affected: 4 PAX Affected: 672 Impact Statement: • Nose gear steering damage discovered during pre-departure walk-around. • Aircraft cannot taxi. • 4 flights cancelled. • 672 pax affected. --------------------------------------
AOG TIMING: -------------------------------------- AOG Declared: 21NOV25 1210Z Parts Onsite NLT: 22NOV25 1200Z Service Onsite NLT: 22NOV25 2200Z RTS NLT Target: 23NOV25 0800Z --------------------------------------
AIRCRAFT IDENTIFICATION: -------------------------------------- Aircraft Type: Airbus A320-251N | Engine: CFM LEAP-1A26 Aircraft Serial: ******** Tail Number: ******** Aircraft Status: At Gate Aircraft Comments: • 56K hrs delivered 2009 • Nose gear overhaul completed May 2024 • Recent towing incident under investigation • Heavy check scheduled DEC 2025 --------------------------------------
AIRCRAFT LOCATION: -------------------------------------- Airport: LTAH - Afyon Airport Airport Location: Afyonkarahisar - TR Airport Time Zone: Europe/Istanbul Stand / Gate: ******** Airport Comments: • Turkish Technic facility nearby • Customs clearance 24hrs for non-EU parts • Language support Turkish/English available • Ground equipment readily available Airport Safety / Risks: • Congested ramp area - coordinate aircraft towing carefully • Security protocols strict - escort required for vendors • Weather stable but fog possible early morning • Political tensions may affect expedited customs --------------------------------------
ATA 100 (iSpec 2200) COMPONENTS: -------------------------------------- Component 1: 32 - Landing Gear Component 2: 29 - Hydraulic Power Component 3: 09 - Towing and Taxiing Component 4: 31 - Instruments --------------------------------------
ERROR / FAULT INDICATION(S): -------------------------------------- • Nose wheel steering tiller has no effect on wheel position • Hydraulic pressure yellow system normal • Steering actuator position sensor reading constant 0 degrees • Unusual noise heard during last taxi per crew report • Visual inspection shows steering collar damage • Torque link appears bent beyond service limits --------------------------------------
PART(S) REQUIREMENTS: -------------------------------------- • Nose Gear Steering Collar P/N A32356100207 (Qty 1) • Steering Actuator P/N 2421100-2 (Qty 1) • Torque Link Assembly P/N A55463000301 (Qty 1) • Hydraulic seals and O-rings kit Sourcing Options Considered: - Alternate Parts Considered - PMA Parts Considered - Used / Serviceable Parts Considered - Overhauled Parts Considered - Lease Considered - Exchange Considered --------------------------------------
TECHNICAL SERVICE REQUIREMENTS: -------------------------------------- - Jack aircraft nose section per AMM 07-21-00 - Remove nose landing gear per AMM 32-11-00 - Replace steering collar and actuator - Replace damaged torque link - Rig steering system per AMM 32-51-11 - Functional check with hydraulics pressurized - Tow test required before flight ops --------------------------------------
TOOLING REQUIRED: -------------------------------------- - Nose landing gear jacks 50 ton capacity - Steering rigging fixture per Airbus tooling - Hydraulic mule for system pressurization - Torque wrenches 200-1000 ft-lbs - Alignment tools and measurement equipment --------------------------------------
LOGISTICS REQUIREMENTS: -------------------------------------- - Airbus AOG parts from Hamburg via Turkish Cargo - Flight departs HAM 1800Z arrives IST 2300Z - Customs clearance arranged via Turkish Technic broker - Estimated customs delay 4-6 hours - Turkish Airlines local stock checked - torque link available - DHL courier from cargo to ramp - 2hr window --------------------------------------
TESTING CERTIFICATION REQUIREMENTS: -------------------------------------- - Nose gear steering functional test per AMM 32-51-00 - Steering angle verification +/- 70 degrees - Hydraulic leak check 30 minutes pressurized - Tow test with tug minimum 100 meters - SHGM (Turkish CAA) release to service --------------------------------------
OPERATIONAL / ENVIRONMENTAL CONSTRAINTS: -------------------------------------- - Customs clearance may take 4-6hrs even with AOG status - Work must coordinate with ramp congestion - limited space - Vendor escort required - arrange with security 24hrs advance - Night shift work preferred to avoid ramp traffic - Tow test requires coordination with ground ops and tower --------------------------------------
COMMERCIAL TERMS: -------------------------------------- - PO required via Turkish Airlines procurement - Standard terms Net 60 days - 18 month warranty on steering components - Core return 90 days required - Payment via SWIFT transfer - Customs and duty costs separate - estimate $2500 -------------------------------------- AOG MANAGER: -------------------------------------- Name: ******** Title: ******** Office Phone: ******** Email: ******** Instructions: ******** -------------------------------------- TECHNICAL CONTACT: -------------------------------------- Name: ******** Title: ******** Office Phone: ******** Email: ******** Instructions: ******** -------------------------------------- LOGISTICS CONTACT: -------------------------------------- Name: ******** Title: ******** Office Phone: ******** Email: ******** Instructions: ******** -------------------------------------- MCC CONTACT: -------------------------------------- Name: ******** Phone: ******** Email: ******** Instructions: ******** -------------------------------------- COMMERCIAL CONTACT: -------------------------------------- Name: ******** Title: ******** Office Phone: ******** Email: ******** Instructions: ********
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