Final answer:
A technician must forward an original copy of Form 337 to the FAA within 48 hours after the aircraft modification or repair.
Step-by-step explanation:
The original question appears to be related to a regulation concerning aviation, specifically referring to a Form 337. However, the provided reference information about DOT regulations for service animals does not apply to Form 337, which is an aircraft modification document. To correctly answer the original question: A technician must forward an original copy of Form 337 to the FAA within 48 hours after the aircraft modification or repair. This is required so that the FAA can maintain accurate records of changes to the airworthiness of an aircraft.