proav said:
If I have a Commercial cert. with Airplane single engine land and sea AND a Flight Instructor cert. with single and multiengine airplane ratings, aren't I legal to flight instruct in a "sea plane"?
Sure you are.
14 CFR 61.195(b) sets forth the aircraft in which an appropriately-rated CFI may instruct:
Sec. 61.195 - Flight instructor limitations and qualifications.
A person who holds a flight instructor certificate is subject to the following limitations:
(b) Aircraft ratings. A flight instructor may not conduct flight training in any aircraft for which the flight instructor does not hold:
(1) A pilot certificate and flight instructor certificate with the applicable category and class rating . . . .
(emphasis added)
14 CFR 61.5(c) sets forth the flight instructor certificates and ratings that are issued by the FAA:
b) The following ratings are placed on a pilot certificate (other than student pilot) when an applicant satisfactorily accomplishes the training and certification requirements for the rating sought:
(1) Aircraft category ratings --
(i) Airplane.
(ii) Rotorcraft.
(iii) Glider
According to 14 CFR 61.5, there is no seaplane category or class instructor rating issued by the FAA.
Applly both of these regs together. You hold a single-engine sea rating on your pilot certificate. You hold the appropriate instructor rating. Therefore, you can instruct in seaplanes.
Are there any minimum hours required, such as the 5 hour rule in make and model for twins, that I need to abide by?
That is set forth in 14 CFR 61.195(f), which addresses instruction in aircraft other than single-engine airplanes:
(f) Training received in a multiengine airplane, a helicopter, or a powered-lift. A flight instructor may not give training required for the issuance of a certificate or rating in a multiengine airplane, a helicopter, or a powered-lift
unless that flight instructor has at least 5 flight hours of pilot-in-command time in the specific make and model of multiengine airplane, helicopter, or powered-lift, as appropriate.
(emphasis added)
There are no restrictions in the regs on PIC requirements for single-engine aircraft. Therefore, as far as the FAA is concerned, you can hop right in a single-engine seaplane and give instruction. Of course, the insurance company will have different ideas about that.
Hope that helps. Have fun splashing and dashing.