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Alert Details

Recovery Plan

KLM 777-300ER at KIAH is held for a TCAS computer failure found during preflight. TCAS FAIL is displayed on both navigation displays and the return sector to EHAM cannot dispatch without ACAS II, requiring a replacement TCAS computer and EASA-licensed avionics support.

Alert Details

Alert type: AOG Alert
Added to platform: 29SEP26 0956Z
Aircraft model: Boeing 777-300ER
Aircraft series: Not specified
Engine model: GE90-110B/-115B
ICAO location: KIAH
Impact type: Revenue PAX
MX window opens: 29SEP26 0215Z
RTS target: 30SEP26 2330Z
Wanted items: 3
Alert specifics: Unscheduled Maintenance
Airworthiness Directive (AD): Not specified
Service Bulletin (SB): Not specified
Check: Not specified
ATA 100 CHAPTERS: 34Navigation
Short fault name: TCAS computer failure, TCAS FAIL
Error / fault indications: TCAS FAIL message on captain and first officer navigation displays and EICAS advisory TCAS. TCAS self-check fails at power-up and after transponder switchover.
Troubleshooting status: Troubleshooting Complete - All required Items listed
TSM/FIM reference: Not specified
Roles and responsibilities: KLM Engineering and Maintenance MCC at EHAM coordinates parts and release. EASA B2 licensed technician performs replacement and certifies release. Local line station provides ramp access and power.

ITEMS

Items in this alert

3 items

Parts & Rotables · WANTED

622-8973-001 - TCAS top directional antenna

Item Id: HWDWW

Serviceable or new TCAS directional antenna with mounting gasket for 777 upper fuselage installation.

Aircraft / Family: Boeing
ATA 100 CHAPTERS: 34Navigation
Required: 30SEP26 1400Z
Quantity: 1

Added to platform: 29SEP26 1001Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Parts & Rotables
Wanted / Available: Wanted
Item Title: TCAS top directional antenna
Sales Copy: TCAS directional antenna for 777-300ER, shipped with the TCAS computer to KIAH.

ITEM DETAILS

Technical specifications

P/N / IPC REF: 622-8973-001
ALT P/Ns: 622-8973-002
Description: Serviceable or new TCAS directional antenna with mounting gasket for 777 upper fuselage installation.
Rev or Version: Rev C
Quantity: 1
ACCEPTABLE MANUFACTURER(s): Collins Aerospace
Manufacturer Type(s) Considered: OEM
Trace Required: OEM trace
Required Onsite D/T Z: 2026-09-30 14:00Z
Onsite Location Type: Ramp
ATA 100 CHAPTERS: 34Navigation
Acceptable Release Documentation / Tag: EASA Form 1, Dual Release

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Not specified
ENGINE MODEL(s): Not specified

TERMS

Terms

Purchase Type(s) Considered: Outright Purchase
Warranty Required: No
Warranty Terms: Not specified
Shipping (Incoterms): DAP

Parts & Rotables · WANTED

822-1338-003 - TCAS computer unit

Item Id: 7XWFU

Serviceable TCAS II computer with change 7.1 software for 777 ACAS II installation, preserved for installation.

Aircraft / Family: Boeing
ATA 100 CHAPTERS: 34Navigation
Required: 30SEP26 1400Z
Quantity: 1

Added to platform: 29SEP26 0959Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Parts & Rotables
Wanted / Available: Wanted
Item Title: TCAS computer unit
Sales Copy: Serviceable Collins TCAS computer for 777-300ER, AOG shipment to KIAH with EASA Form 1 or dual release.

ITEM DETAILS

Technical specifications

P/N / IPC REF: 822-1338-003
ALT P/Ns: 822-1338-002
Description: Serviceable TCAS II computer with change 7.1 software for 777 ACAS II installation, preserved for installation.
Rev or Version: Mod 5
Quantity: 1
ACCEPTABLE MANUFACTURER(s): Collins Aerospace
Manufacturer Type(s) Considered: OEM
Trace Required: OEM trace
Required Onsite D/T Z: 2026-09-30 14:00Z
Onsite Location Type: Ramp
ATA 100 CHAPTERS: 34Navigation
Acceptable Release Documentation / Tag: EASA Form 1, Dual Release

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Not specified
ENGINE MODEL(s): Not specified

TERMS

Terms

Purchase Type(s) Considered: Outright Purchase
Warranty Required: No
Warranty Terms: Not specified
Shipping (Incoterms): DAP

Maintenance Services · WANTED

Avionics technician onsite, EASA Part-66 B2

Item Id: MYKM3

Provide an EASA Part-66 B2 licensed technician with 777 type rating for TCAS computer and antenna replacement, bonding check, TCAS self-check, and CRS issue.

Aircraft / Family: Boeing 777-300ER
ATA 100 CHAPTERS: 34Navigation
Required: 30SEP26 1400Z
Location: KIAH

Added to platform: 29SEP26 1002Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Maintenance Services
Wanted / Available: Wanted
Item Title: Avionics technician onsite, EASA Part-66 B2
Sales Copy: EASA B2 777-rated avionics technician onsite at KIAH for TCAS recovery and certificate of release to service.

ITEM DETAILS

Technical specifications

Description: Provide an EASA Part-66 B2 licensed technician with 777 type rating for TCAS computer and antenna replacement, bonding check, TCAS self-check, and CRS issue.
Required Onsite D/T Z: 2026-09-30 14:00Z
Onsite Location Type: Ramp
ATA 100 CHAPTERS: 34Navigation

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Not specified
Aircraft Model: Boeing 777-300ER
ENGINE MODEL(s): Not specified

OPERATIONAL CHANGES

Alert status updates

No visible status updates have been posted.

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Alert Details

Alert type

AOG Alert

Added to platform

29SEP26 0956Z

Aircraft model

Boeing 777-300ER

Aircraft series

Not specified

Engine model

GE90-110B/-115B

ICAO location

KIAH

Impact type

Revenue PAX

MX window opens

29SEP26 0215Z

RTS target

30SEP26 2330Z

Wanted items

Alert specifics

Unscheduled Maintenance

Airworthiness Directive (AD)

Not specified

Service Bulletin (SB)

Not specified

Check

Not specified

ATA 100 CHAPTERS

34Navigation

Short fault name

TCAS computer failure, TCAS FAIL

Error / fault indications

TCAS FAIL message on captain and first officer navigation displays and EICAS advisory TCAS. TCAS self-check fails at power-up and after transponder switchover.

Troubleshooting status

Troubleshooting Complete - All required Items listed

TSM/FIM reference

Not specified

Roles and responsibilities

KLM Engineering and Maintenance MCC at EHAM coordinates parts and release. EASA B2 licensed technician performs replacement and certifies release. Local line station provides ramp access and power.