SUPPLEMENT NO. 1TO LB. 2012A
issued September 1969
M A I N T E N A N C E M A N U A L
covering
551RL SERVO AMPLIFIER-INDICATOR
This supplement, when used in conjunction with ADF-T-
12B/C Maintenance Manual I. B. 2012A, revised October
1969, provides information to support the 551RL Servo
Amplifier-Indicator.
NOTE
Only paragraphs affected by this supplement are re¬
ferred to within this supplement. This supplement
includes pages 101 and 102 which were not printed
during the revision dated March 1969.