(6)  
Pull ALTM LOW R1 circuit breaker and check that warning flag on captain's height indicator comes into view.

 (7)  
A height indicator is not provided on airplanes with a LRRA-3 system. Check operational status of this system by opening ALTM LOW R3 circuit breaker on the P126 panel. The LRRA-3 failure annunciator display on the pilots' P2 panel changes to red. Close the circuit breaker. The LRRA-3 failure annunciator changes to black signifying LRRA-3 system is operational.

 (8)  
On AF, AT, GN, MD airplanes, turn off captain's and first officer's LRRA system in turn at applicable height indicator and check that OFF flag comes into view covering warning flag. Return systems to on.

 (9)  
Restore LRRA-1, -2, and -3 to normal.

 (10)
 Remove electrical power if no longer required (Ref 24-22-00).

 EFFECTIVITY

 
 ALL  20 Page 502  Apr 25/8834-33-00
 LRRA RECEIVER/TRANSMITTER - REMOVAL/INSTALLATION
________________________________________________

 1.  General
_______
 A.  The LRRA receiver/transmitters are located in center equipment center E9 and retained in their mount by means of two knurled clamp nuts.
 2.  Referenced Procedures_____________________
 A.  24-22-00, Maintenance Practices (Apply Power)
 3.  Remove LRRA Receiver/Transmitter________________________________
 A.  Open ALTM LOW Rl or ALTM LOW R2 circuit breaker on overhead circuit breaker panel P7, as applicable for R/T unit being replaced.
 B.  On AZ ALL, LH 004-099, SN 351-399 and IB 406-499,
 open circuit breaker ALTM LOW R3 on circuit breaker panel P126.

 C.  Loosen knurled nut securing unit to rack mounting.
 D.  Pull unit out of mounting to disengage electrical connector and remove unit.
 4.  Install LRRA Receiver/Transmitter_________________________________
 WARNING: TO PREVENT A POSSIBLE HARD LANDING ONTO WET RUNWAYS USING THE
_______ AFCS AUTOLAND MODE, ONLY INSTALL BENDIX ALA-51A R/T UNIT WITH A "3" IN THE NINTH DIGIT OF THE PART NUMBER (e.g., 2067631-5"3"01) OR COLLINS 860F-4 R/T UNIT WITH A "1" IN THE EIGHTH DIGIT OF THE PART NUMBER (I.E., 622-3890-"1"02) AS SHOWN IN TABLE 401.
 EFFECTIVITY

 

 ALL  17 Page 401  Dec 25/8734-33-02
 ~ê  BENDIX ALA-51A R/T UNITS *[5]  COLLINS 860F-4 R/T UNITS *[5]  èê”ê.  PART NO. *[1]  PART NO. *[2]  PART NO. *[3]  PART NO. *[4] è”””.  2067631-0501  2067631-5301  622-3890-002  622-3890-102  è”””.  2067631-0502  2067631-5302  622-3890-003  622-3890-103  è”””.  2067631-0505  2067631-5305  622-3890-004  622-3890-104  è”””.  2067631-0506  2067631-6306  622-3890-014  622-3890-114  è”””.  2067631-5111  2067631-5311    è”””.  2067631-5112  2067631-5312    è”””.  2067631-5114  2067631-5314    è”””.  2067631-5115  2067631-5315    è”””.  2067631-5116  2067631-5316    è”””.  2067631-5117  2067631-5317    è”””.  2067631-5121  2067631-5321    è”””.  2067631-5123  2067631-5323    è”””.  2067631-5131  2067631-5331    ééé
 *[1] AIRPLANES NOT INCORPORATING SB 34A2226
 *[2] AIRPLANES INCORPORATING SB 34A2226
 *[3] AIRPLANES NOT INCORPORATING SB 34A2225
 *[4] AIRPLANES INCORPORATING SB 34A2225
 *[5] USE ONLY APPLICABLE R/T UNIT PART NO.
　
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