Requirement: 1. For Model 737-100 and -2Requirement: 1. For Model 737-100 and -200 series aeroplanes equipped with battery charger Boeing Part Number (P/N) 10-60701-1:

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Requirement: 1. For Model 737-100 and -200 series aeroplanes equipped with battery charger Boeing Part Number (P/N) 10-60701-1:

Replace the battery charger with a new or serviceable battery charger, Boeing P/N 10-60701-3, in accordance with Chapter 21-10-111 of the Boeing 737 Airplane Maintenance Manual (AMM), and
Replace the battery with a new or reconditioned battery in accordance with Chapter 24-31-11 of the Boeing 737 AMM.

Incorporation of Boeing Alert Service Bulletin (ASB) 737-24A1136 dated 27 April 2000 or Revision 1 dated 24 January 2002 or Revision 2 dated 7 August 2003 is optional and allows the battery maintenance to be scheduled in accordance with the Boeing 737 Maintenance Planning Document (MPD).

2. For Model 737-300, \-400 and \-500 series aeroplanes \- Replace the battery with a new or reconditioned battery in accordance with Chapter 24-31-11 of the Boeing 737 AMM.

Incorporation of ASB 737-24A1136 or Revision 1 or Revision 2 is optional and allows the battery maintenance to be scheduled in accordance with the 737 MPD.

3. For all Model 737-100, \-200, \-300, \-400 and \-500 series aeroplanes \- Perform a test to determine the condition of the Generator Control Unit (GCU) diode CR910 in accordance with Boeing Telex Message M-7200-99-01528 dated 5 March 1999.

If the diode fails the Requirement 3 test, replace the GCU with a new or serviceable GCU and the battery with a new or reconditioned battery. Repeat the Requirement 3 diode test until successful completion of the test is achieved.
Once the Requirement 3 diode test has been successfully completed, repeat the diode test.