- install the HF 2 coupler.

 (2) If the fault continues:

 - make sure that the bonding contact resistance between the antenna and the fuselage structure is not higher than 5 milliohms (Ref. AMM TASK 20-28-00-912-005).

 (3) If the fault continues:

 - replace the ANTENNA-HF (5RE) (Ref. AMM TASK 23-11-11-000-001) and (Ref. AMM TASK 23-11-11-400-001).
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210, 301-399, 401-499,
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 248
 201-210, 301-399, 401-499, Aug 01/05 CES

R **ON A/C 051-099, 106-149, 201-299, 301-399, 401-499,

 TASK 23-11-00-810-823
 Loss of one or two HF transmission/reception
 1. Possible Causes
_______________
 - CAPT PTT SWITCH (11RN)

 - F/O PTT SWITCH (12RN)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-11-00-710-001 Operational Test of the HF System AMM 27-92-41-000-010 Removal of the Radio PTT Switch (11RN,12RN) AMM 27-92-41-400-010 Installation of the Radio PTT Switch (11RN,12RN) TSM 23-11-00-810-815 Loss of the HF 1 Transmission TSM 23-11-00-810-816 Loss of the HF 1 Reception TSM 23-11-00-810-817 Loss of the HF 2 Transmission TSM 23-11-00-810-818 Loss of the HF 2 Reception
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the HF system (Ref. AMM TASK 23-11-00-710-001).
 4. Fault Isolation
_______________
R **ON A/C 051-099, 201-210, 301-399, 401-499,
 A. The transmission function is not possible during the operational test of the HF 1/HF 2 system:
 - Do the procedure (Ref. TSM TASK 23-11-00-810-815) (Ref. TSM TASK 23-11-00-810-817).
 (1) If the reception function is not possible during the operational test of the HF 1/HF 2 system:
 - Do the procedure (Ref. TSM TASK 23-11-00-810-816) (Ref. TSM TASK 23-11-00-810-818).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 106-149, 201-299, 301-399, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 249
 401-499, Aug 01/05 CES

 (a) If the fault continues and if the Captain does the report of the event:

 - Replace on the Captain's side stick the CAPT PTT SWITCH (11RN), (Ref. AMM TASK 27-92-41-000-010) (Ref. AMM TASK 27-92-41-400-010).

 (b) If the fault continues and if the First Officer does the report of the event:

 - Replace on the First Officer's side stick the F/O PTT SWITCH (12RN), (Ref. AMM TASK 27-92-41-000-010) (Ref. AMM TASK 27-92-41-400-010).
 **ON A/C 106-149, 211-299,
 A. If the transmission function is not possible during the operational test of the HF 1 system:
 - Do the procedure (Ref. TSM TASK 23-11-00-810-815).
 (1) If the reception function is not possible during the operational test of the HF 1 system:
 - Do the procedure (Ref. TSM TASK 23-11-00-810-816).
 (a) If the fault continues and if the Captain does the report of the event:

 - Replace on the Captain's side stick the CAPT PTT SWITCH (11RN), (Ref. AMM TASK 27-92-41-000-010) (Ref. AMM TASK 27-92-41-400-010).

 (b) If the fault continues and if the First Officer does the report of the event:

 - Replace on the First Officer's side stick the F/O PTT SWITCH (12RN), (Ref. AMM TASK 27-92-41-000-010) (Ref. AMM TASK 27-92-41-400-010).
R **ON A/C 051-099, 106-149, 201-299, 301-399, 401-499,
 B. Do the operational test of the HF system (Ref. AMM TASK 23-11-00-710-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 106-149, 201-299, 301-399, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 250
 401-499, Aug 01/05 CES

R **ON A/C 106-149, 211-299, 301-399, 401-499,
 TASK 23-11-00-810-824
 Fault between ATSU and HF 1
 1. Possible Causes
_______________
 - ATSU (1TX1)

 - XCVR-HF, 1 (3RE1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
　
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