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Alert Details

Recovery Plan

Southwest 737-700 at KSAN is held after a number 2 engine fuel leak was found at the hydromechanical unit during walkaround. HMU and fuel pump replacement support is required for return to service.

Alert Details

Alert type: AOG Alert
Added to platform: 28SEP26 1623Z
Aircraft model: Boeing 737-700
Aircraft series: Not specified
Engine model: CFM56-7B
ICAO location: KSAN
Impact type: Revenue PAX
MX window opens: 28SEP26 1700Z
RTS target: 30SEP26 1500Z
Wanted items: 4
Alert specifics: Unscheduled Maintenance
Airworthiness Directive (AD): Not specified
Service Bulletin (SB): Not specified
Check: Not specified
ATA 100 CHAPTERS: 73Engine Fuel and Control
Short fault name: Number 2 engine HMU fuel leak
Error / fault indications: Fuel staining and active fuel leak observed at the number 2 engine hydromechanical unit during walkaround inspection.
Troubleshooting status: Troubleshooting Complete - All required Items listed
TSM/FIM reference: Not specified
Roles and responsibilities: Southwest MCC coordinates parts and aircraft release. Powerplant mechanic performs HMU and fuel pump replacement. Approved maintenance personnel perform leak check and engine ground run.

ITEMS

Items in this alert

4 items

Parts & Rotables · WANTED

CFM56-7B-HMU-SGK - HMU and engine-driven fuel pump seal and gasket kit

Item Id: UPCGA

New seal, O-ring, and gasket kit for HMU and engine-driven fuel pump installation, packaged for AOG use.

Aircraft / Family: Boeing
ATA 100 CHAPTERS: 73Engine Fuel and Control
Required: 29SEP26 1000Z
Quantity: 1

Added to platform: 28SEP26 1629Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Parts & Rotables
Wanted / Available: Wanted
Item Title: HMU and engine-driven fuel pump seal and gasket kit
Sales Copy: Complete seal and gasket kit for CFM56-7B HMU and engine-driven fuel pump replacement at KSAN.

ITEM DETAILS

Technical specifications

P/N / IPC REF: CFM56-7B-HMU-SGK
ALT P/Ns: 73-21-00-SGK
Description: New seal, O-ring, and gasket kit for HMU and engine-driven fuel pump installation, packaged for AOG use.
Rev or Version: Rev 1
Quantity: 1
ACCEPTABLE MANUFACTURER(s): Safran
Manufacturer Type(s) Considered: OEM
Trace Required: OEM trace
Required Onsite D/T Z: 2026-09-29 10:00Z
Onsite Location Type: Hangar / Maintenance Facility
ATA 100 CHAPTERS: 73Engine Fuel and Control
Acceptable Release Documentation / Tag: FAA Form 8130-3

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Boeing 737-700
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

P/N 4112T18G01 - Number 2 engine-driven fuel pump

Item Id: WRG4F

Engine-driven fuel pump suitable for the CFM56-7B number 2 engine, inspected and preserved for installation.

Aircraft / Family: Boeing
ATA 100 CHAPTERS: 73Engine Fuel and Control
Required: 29SEP26 1000Z
Quantity: 1

Added to platform: 28SEP26 1628Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Parts & Rotables
Wanted / Available: Wanted
Item Title: Number 2 engine-driven fuel pump
Sales Copy: Serviceable CFM56-7B engine-driven fuel pump for AOG fuel leak recovery at KSAN, available with trace and approved release documentation.

ITEM DETAILS

Technical specifications

P/N / IPC REF: P/N 4112T18G01
ALT P/Ns: P/N 4112T18G02
Description: Engine-driven fuel pump suitable for the CFM56-7B number 2 engine, inspected and preserved for installation.
Rev or Version: Rev 2
Quantity: 1
ACCEPTABLE MANUFACTURER(s): Parker Aerospace
Manufacturer Type(s) Considered: OEM
Trace Required: OEM trace
Required Onsite D/T Z: 2026-09-29 10:00Z
Onsite Location Type: Hangar / Maintenance Facility
ATA 100 CHAPTERS: 73Engine Fuel and Control
Acceptable Release Documentation / Tag: FAA Form 8130-3

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Boeing 737-700
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

PMA73-1127 - Number 2 engine hydromechanical unit, HMU

Item Id: 7RXHR

Hydromechanical unit compatible with CFM56-7B number 2 engine, inspected for fuel metering performance and ready for installation.

Aircraft / Family: Boeing
ATA 100 CHAPTERS: 73Engine Fuel and Control
Required: 29SEP26 1000Z
Quantity: 1

Added to platform: 28SEP26 1627Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Parts & Rotables
Wanted / Available: Wanted
Item Title: Number 2 engine hydromechanical unit, HMU
Sales Copy: Serviceable or overhauled CFM56-7B hydromechanical unit for expedited replacement at KSAN, with trace and approved release documentation.

ITEM DETAILS

Technical specifications

P/N / IPC REF: PMA73-1127
ALT P/Ns: 4057T12G01
Description: Hydromechanical unit compatible with CFM56-7B number 2 engine, inspected for fuel metering performance and ready for installation.
Rev or Version: Rev 3
Quantity: 1
ACCEPTABLE MANUFACTURER(s): Woodward
Manufacturer Type(s) Considered: OEM
Trace Required: OEM trace
Required Onsite D/T Z: 2026-09-29 10:00Z
Onsite Location Type: Hangar / Maintenance Facility
ATA 100 CHAPTERS: 73Engine Fuel and Control
Acceptable Release Documentation / Tag: FAA Form 8130-3

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Boeing 737-700
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

Powerplant mechanic onsite, FAA A&P

Item Id: 4MG4M

Provide an FAA A&P mechanic with CFM56-7B experience for number 2 engine fuel system troubleshooting, HMU and pump replacement, leak inspection, and return-to-service support.

Aircraft / Family: Boeing 737-700
ATA 100 CHAPTERS: 73Engine Fuel and Control
Required: 29SEP26 1000Z
Location: KSAN

Added to platform: 28SEP26 1629Z

DetailsClose

ITEM WORKFLOW

Item basics

Item Type: Maintenance Services
Wanted / Available: Wanted
Item Title: Powerplant mechanic onsite, FAA A&P
Sales Copy: FAA A&P powerplant mechanic available onsite at KSAN for CFM56-7B HMU and fuel pump replacement, leak check, and engine ground run.

ITEM DETAILS

Technical specifications

Description: Provide an FAA A&P mechanic with CFM56-7B experience for number 2 engine fuel system troubleshooting, HMU and pump replacement, leak inspection, and return-to-service support.
Required Onsite D/T Z: 2026-09-29 10:00Z
Onsite Location Type: Hangar / Maintenance Facility
ATA 100 CHAPTERS: 73Engine Fuel and Control

APPLICABILITY & CONDITION

Applicability and condition

Conditions Considered: Not specified
AIRCRAFT MODEL(s): Boeing 737-700
Aircraft Model: Boeing 737-700
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

28SEP26 1623Z

Aircraft model

Boeing 737-700

Aircraft series

Not specified

Engine model

CFM56-7B

ICAO location

KSAN

Impact type

Revenue PAX

MX window opens

28SEP26 1700Z

RTS target

30SEP26 1500Z

Wanted items

Alert specifics

Unscheduled Maintenance

Airworthiness Directive (AD)

Not specified

Service Bulletin (SB)

Not specified

Check

Not specified

ATA 100 CHAPTERS

73Engine Fuel and Control

Short fault name

Number 2 engine HMU fuel leak

Error / fault indications

Fuel staining and active fuel leak observed at the number 2 engine hydromechanical unit during walkaround inspection.

Troubleshooting status

Troubleshooting Complete - All required Items listed

TSM/FIM reference

Not specified

Roles and responsibilities

Southwest MCC coordinates parts and aircraft release. Powerplant mechanic performs HMU and fuel pump replacement. Approved maintenance personnel perform leak check and engine ground run.