[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR121.139]

[Page 429]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
PART 121_OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL 
OPERATIONS--Table of Contents
 
                      Subpart G_Manual Requirements
 
Sec. 121.139  Requirements for manual aboard aircraft: Supplemental 
operations.

    (a) Except is provided in paragraph (b) of this section, each 
certificate holder conducting supplemental operations shall carry 
appropriate parts of the manual on each airplane when away from the 
principal base of operations. The appropriate parts must be available 
for use by ground or flight personnel. If the certificate holder carries 
aboard an airplane all or any portion of the maintenance part of its 
manual in other than printed form, it must carry a compatible reading 
device that produces a legible image of the maintenance information and 
instructions or a system that is able to retrieve the maintenance 
information and instructions in the English language.
    (b) If a certificate holder conducting supplemental operations is 
able to perform all scheduled maintenance at specified stations where it 
keeps maintenance parts of the manual, it does not have to carry those 
parts of the manual aboard the aircraft en route to those stations.

[Doc. No. 6258, 29 FR 19196, Dec. 31, 1964, as amended by Amdt. 12-71, 
35 FR 17176, Nov. 7, 1970; Amdt. 121-253, 61 FR 2611, Jan. 26, 1996; 
Amdt. 121-262, 62 FR 13256, Mar. 19, 1997; 62 FR 15570, Apr. 1, 1997]