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Service Bulletins

Below are some of the key service bulletins for Lear Romec & Hydro-Aire.

Hydro-Aire

Fuel Booster Pump - Pumping Unit - Inspection to Detect Improper Fuel Pump Internal Lead Wire Routing

This Service Bulletin provides supplemental inspection instructions to ensure proper routing of the lead wires connecting the pumping unit stator to the pump connector. The procedures supplement procedures provided in the Component Maintenance Manuals (CMMs) referenced in paragraph 1.L.

60-847-28-2, Rev 0

Fuel Booster Pump - Pumping Unit - Inspection to Detect Improper Fuel Pump Internal Lead Wire Routing.

Fuel Pump - Motor-Impeller Subassembly - Inspection To Detect Improper Fuel Pump Internal Wire Bundle Routing

This Service Bulletin provides supplemental inspection and assembly instructions to ensure proper routing of the wire bundle connecting the motor-impeller stator to the pump connector. The procedures supplement assembly procedures provided in the Component Maintenance Manuals (CMMs) given in paragraph 1.L.

Crane Hydro-Aire Motor-Impeller - 28-01, Rev 2

Fuel Booster Pump - Pumping Unit - Inspection to Detect Improper Fuel Pump Internal Lead Wire Routing.

Inlet Check Valve/Inlet Adapter - Boeing 747 Override/Jettison Fuel Pumps

Hydro-Aire has issued 4 FAA approved service bulletins to upgrade the Boeing 747 Override/ Jettison Fuel Pump to provide terminating action for FAA Airworthiness Directive AD98-16-19, later superseded by AD 2001-21-07. This upgrade replaces the inlet check valve on the housing and the inlet adapter on the pumping unit

Boeing has released corresponding FAA approved service bulletin 747-28A2212R3, providing for the CWT pump replacement with upgraded units. Incorporation of this service bulletin terminates the ADs and eliminates the requirement to perform the mandated inspections and maintain a minimum level of fuel in the center wing tank (CWT).

Boeing has also released service bulletin 747-28-2222 recommending the upgrade of the Override/Jettison Fuel Pumps installed in each of the inboard main tanks and the two installed in the Horizontal Stabilizer Tank (HST) for the 747 aircraft.

60-703-28-33, Rev 2	Inlet Check Valve Modification / Fuel Pump Housing.
60-721-28-5, Rev 3 (see note 1)	Inlet Adapter Replacement for the P/Ns 60-72101, 60-72101-1 and 60-72101-2 Fuel Pumps.
60-723-28-5, Rev 3 (see note 1)	Inlet Adapter Replacement for P/N 60-72301 Fuel Pump.
60-703-28-35, Rev 3 (see note 1)	Inlet Adapter Replacement for the P/Ns 60-70303, 60-70306, 60-70307, 60-70308, 60-70309, 60-703103 60-703104 and 60-703113 Fuel Pumps.

Note 1: It would be most cost effective to accomplish the Inlet Adapter Upgrade simultaneously with the Connector Upgrade (see below) on the Boeing 747 Override/Jettison Pump.

Discharge Check Valve - Boeing 747 Override/Jettison Fuel Pumps

In addition, Hydro-Aire has introduced an improved Discharge Check Valve for the Boeing 747 Override/Jettison Fuel Pump Housing which eliminates some field reported failures involving bent hinge arms causing misalignment as well as broken springs and hinge pins. Hydro-Aire recommends upgrading to this new valve at the same time as the Inlet Check Valve (above).

60-703-28-34, Rev 1

Discharge Check Valve Modification / Pump Housing

Connector Upgrade - Boeing 747 Fuel Pumps, Override/Jettison and Boost, Boeing 757 Fuel Pumps, Override and Boost, Boeing 737NG Fuel Pumps, Override and Boost

Hydro-Aire has issued 14 FAA approved service bulletins to upgrade the Boeing 747 Override/ Jettison and Boost Fuel Pumps, Boeing 757 Override and Boost Fuel Pumps, and the 737NG Override and Boost Fuel Pumps to provide for terminating action for FAA Airworthiness Directive AD97-03-17. This upgrade to the new “–4” version replaces the electrical connector and end cap (if required) on the motor-impeller assembly (pumping unit).

Boeing has released corresponding FAA approved service bulletins 747-28A2241, providing for the Boeing 747 Override/Jettison and Boost Fuel Pump replacement and 757-28A0066 and 757-28A0067, providing for the Boeing 757 Override and Boost Fuel Pump replacement with the upgraded “-4” versions of the fuel pumps. Incorporation of these service bulletins has been approved by the FAA as an AMOC (Alternate Means of Compliance) for AD97-03-17 and eliminates the requirement to perform the mandated electrical inspections.

Boeing has released FAA approved service bulletin 737-28A1184, providing for the Boeing 737NG Override and Boost Fuel Pump replacement with the upgraded “-4” versions of the fuel pumps. While no FAA AD was issued for the 737NG, the inspection and test requirements were imposed by Certification Maintenance Requirements 28-CMR-01 and 28-CMR-02. Incorporation of this service bulletin eliminates the repetitive pump inspection and test requirements specified in the Certification Maintenance Requirements 28-CMR-01 and 28-CMR-02.

60-703-28-36, Rev 0	Fuel Override/Jettison Pump - Modification Of P/N 60-703 Series Motor-Impeller Subassemblies To P/N 60-72301-4 (Boeing P/N 60b92603-418)
60-72101-28-01, Rev 1	Fuel Override/Jettison Pump Connector Replacement Modification P/N 60-72101 (Boeing P/N 60b92603-17), P/N 60-72101-3 (Boeing P/N 60b92603-317), P/N 60‑72101-1 (Boeing P/N 60b92603-22), P/N 60-72101-3A (Boeing P/N 60b92603-322), P/N 60-72101-2 (Boeing P/N 60b92603-23), And P/N 60-72101-3B (Boeing P/N 60b92603-24) To P/N 60-72101-4 (Boeing P/N 60b92603-26)
60-72301-28-1, Rev 0	Fuel-Override/Jettison Pump - Modification Of P/N 60-72301 (Boeing P/N 60b92603-18) And P/N 60‑72301-3 (Boeing P/N 60b92603-318) Motor-Impeller Subassemblies To P/N 60‑72301-4 (Boeing P/N 60b92603-418)
60-75501-28-01, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly P/N 60-75501 (Boeing P/N 60B92404-3) To P/N 60-75501-4 (Boeing 60B92404-403)
60-75503-28-1, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly P/N 60-75503 (Boeing P/N 60B92404-4) To P/N 60-75503-4 (Boeing 60B92404-404)
60-75504-28-1, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly P/N 60-75504 (Boeing P/N 60B92404-5) To P/N 60-755100-4 (Boeing P/N 60B92404-8)
60-75504-28-2, Rev 0	Fuel Boost Pump - Modification of Motor-Impeller Subassembly, P/N 60-75504 (Boeing P/N 60B92404-5) to P/N 60-755100-5 (Boeing P/N 60B92404-10).
60-755100-28-1, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly P/N 60-755100 (Boeing P/N 60B92404-6) And 60-755100-2 (Boeing P/N 60B92404-7) To P/N 60-755100-4 (Boeing P/N 60B92404-8)
60-755100-28-2, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassemblies P/N 60-755100 (Boeing P/N 60B92404-6), 60-755100-2 (Boeing P/N 60B92404-7), & 60-755100-4 (Boeing P/N 60B92404-8) to P/N 60-755100-5 (Boeing P/N 60B92404-10).
60-98902-28-1, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly, P/N 60-98902 (Boeing P/N 60B89004-2) And P/N 60-98902a (Boeing P/N 60B89004-21) To P/N 60-98976-4 (Boeing P/N 60B89004-15).
60-98904-28-1, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly, P/N 60-98904 (Boeing P/N 60B89004-4) And P/N 60-98904A (Boeing P/N 60B89004-41) To P/N 60-98976-4 (Boeing P/N 60B89004-15).
60-98906-28-1, Rev 0	Fuel Boost Pump – Modification Of Motor – Impeller Subassembly, P/N 60-98906 (Boeing P/N 60B89004-6) And P/N 60-98906A (Boeing P/N 60B89004-61) To P/N 60‑98976-4 (Boeing P/N 60B89004-15).
60-98908-28-1, Rev 0	Override Pump - Modification Of Motor - Impeller Subassembly, P/N 60-98908 (Boeing P/N 60B89004-8) And P/N 60-989100 (Boeing P/N 60B89004-10) To P/N 60-989100-4 (Boeing P/N 60B89004-14).
60-98908-28-2, Rev 0	Override Pump - Modification Of Motor-Impeller Subassemblies 60-98908 (Boeing P/N 60B89004-8) and 60-989100 (Boeing P/N 60B89004-10) to 60-989100-5 (Boeing P/N 60B89004-16) used on Boeing 737-600/700/700C/800/900 and 757 Aircraft.
60-98976-28-1, Rev 0	Fuel Boost Pump - Modification Of Motor-Impeller Subassembly, P/N 60-98976-2 (Boeing P/N 60B89004‑13) To P/N 60-98976-4 (Boeing P/N 60B89004-15).
60-989100-28-1, Rev 0	Override Pump - Modification Of Motor-Impeller Subassembly, P/N 60-989100-2 (Boeing P/N 60B89004-12) To P/N 60-989100-4 (Boeing P/N 60B89004-14).
60-989100-28-2, Rev 0	Override Pump - Modification Of Motor-Impeller Subassemblies P/N 60-989100-2 (Boeing P/N 60B89004-12) and 60-989100-4 (Boeing P/N 60B89004-14) to 60-989100-5 (Boeing P/N 60B89004-16) used on Boeing 737-600/700/700C/800/900 and 757 Aircraft.

Recent Service Information Letters

60-847-3-1 Dated August 16, 2001, Rev 1	MD11/DC-10 Fuel Pump Harness Test Tool Description and Sketches.
60-847-3-1 Alternate Tool Drawings (T-67291-1), Rev C	Alternate Tool Drawings
60-72101-4-01 Dated August 28, 2002, Rev 0	Improper Fuel Pump Internal Wire Bundle Routing.
60072101-4-02 dated November 8, 2002, Rev 0	Resumption of "-4" Fuel Pump Motor-Impeller Upgrades.

Recent Service Bulletins

60-721-28-3, Rev 1	Fuel Override/Jettison Pump - Replacement of Thrust Washer P/N 60-06561 on the P/N 60-72101, P/N 60-72301, AND P/N 60-72101-1 Motor-Impeller Subassembly.
60-721-28-4, Rev 0	Fuel Override/Jettison Pump - Replacement of Thrust Washer P/N 60-06561 on the P/N 60-72101-2 Motor-Impeller Subassembly.
60-703-28-32, Rev 1	Fuel Override/Jettison Pump - Replacement of Thrust Washer P/N 60-06561 on the P/N 60-703 SERIES Motor-Impeller Subassembly.
40-625-5-32-3, Rev 0	LANDING GEAR - Modification of Transducer Assembly - Wheel and Spoiler, P/N 40-625-5 TO 40-625-7.
40-625-6-32-196, Rev 0	LANDING GEAR - Modification of Transducer Assembly - Wheel and Spoiler, P/N 40-625-6 TO 40-625-8

Lear Romec

LR37940-79-006	LR37940 series Trent engine lube & scavenge pump removal of IGB scavenge inlet screen.
LR37940-79-007, Rev 1	LR37940 series Trent engine lube & scavenge pump replacement of orifice and pressure relief valve.
LR37940-79-007, RSI-1	LR37940 series Trent engine lube & scavenge pump reference supplemental information for SB LR37940-79-007.
RG9080-73-001	RG9080 series fuel pump replacement valve housing & related seals.
RG9570M1 & RG9570R1	Fuel Pump - Replacement of valve housing and related seals.
RG17980-73-001	Fuel Pump - Replacement of valve housing and related seals.
RG9570-73-001	Fuel Pump - Replacement of valve housing and related seals.
RG15980-73-003	Fuel Pump - Replacement of valve housing and related seals.
RG9570-RSI-1	Fuel Pump - Inspection of relief valve housing gasket.
RR53710K	Fuel Pump - Inspection of motor armature end play.
RG34720D	Fuel Pump - Torquing of Relief Valve Cover Screws
RG34720-73-001	Fuel Pump - Replacement of valve housing and related seals.
RG9570M, M1,R, Rev. 2	Fuel Pump - Torquing of Relief Valve Cover Screws

Additional Information

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