TM  55-2835-209-23 Section  VI  PREVENTIVE  MAINTENANCE  CHECKS AND  SERVICES  (PMCS) 1-23  GENERAL  DESCRIPTION This  section  contains  requirements  for special  inspections  and  standards  of serviceability  applicable  to  the  APU  and PMCS. The tasks listed in the PMCS table shall be performed at the inter- vals specified. A description of the PMCS table is given in paragraph 1-27. 1-24 DROPPED ENGINE INSPECTION Technical  Inspector  shall  perform  over- all inspection of APU if it was dropped. Check for any broken, bent or kinked tube assemblies, cracked air inlet, dented  combustor  case,  damaged  APU  har- ness  assembly/connectors,  damaged  fuel manifold assembly and other damage. Refer to DA PAM 738-751 for applicable forms, records and worksheets. 1-25 FOREIGN OBJECT DAMAGE (FOD) IN- SPECTION Inspect  APU  components  during  detailed applicable  tasks. 1-26  HOT  END  INSPECTION Inspect  hot  end  components  (combustor case, liner, etc) in accordance with the detailed inspection tasks of Chapter 1. 1-26.1 DESCRIPTION OF PMCS TABLE a. Step number column. This column shall be used as a source of item numbers for the TM Number Column on DA Form 2404, Equipment b. c. d. e. Inspection and Maintenance Worksheet, in recording re- sults of PMCS. Interval column. This col- umn defines the interval, in hours of APU operation, that all tasks shall be per- formed. The helicopter log shall be used to determine hours of APU operation. Item to be inspected column. This column describes the item to be inspected (or serviced). Task column. This column assigns  responsibility  for performing each task to ei- ther AVUM or AVIM. An "X" indicates that a description of the task is provided in the REMARKS column. A task number indicates a de- scription of the task is given in that procedure. Remarks column. This column provided  supplementary  in- formation relating to the interval of performing cer- tain  tasks. In  addition, when an "X" is indicated in the TASK column, a de- scription of the task is given in the REMARKS column. 1-26.2 PREVENTIVE MAINTENANCE CHECKS AND  SERVICES Following  are  the  preventive  maintenance checks and services used for scheduled maintenance of the APU. 1-20 Change 1