AFM
1.17.1.4 - DC-10 Aircraft Operation Manual:
Section 3 - Paragraph 3.1.17 Procedures of operation with unserviceable thrust engine reverse:
Thrust reversers: a fan thrust reverser:
· aircraft shall not depart an airport/ station where repair or replacement can be made,
· the unserviceable fan thrust reverser is secured and stowed according to MAI78-00-01,
· when dispatching from a wet or contaminated runway, the thrust used for take-off shall not be less than full A rating.