He failed the flight test on the thirtieth day due to
crosswind landings. We had flown the entire month without have
to make a cross wind landing.

§61.87 Solo requirements for student pilots.

(a) General. A student pilot may not operate an aircraft in solo flight unless
that student has met the requirements of this section.

(c) Pre-solo flight training. Prior to conducting a solo flight, a student
pilot must have:

(1) Received and logged flight training for the maneuvers and procedures of
this section that are appropriate to the make and model of aircraft to be
flown; and

(2) Demonstrated satisfactory proficiency and safety, as judged by an
authorized instructor, on the maneuvers and procedures required by this
section in the make and model of aircraft or similar make and model of
aircraft to be flown.

(d) Maneuvers and procedures for pre-solo flight training in a single-engine
airplane. A student pilot who is receiving training for a single-engine
airplane rating must receive and log flight training for the following
maneuvers and procedures:

(3) Takeoffs and landings, including normal and CROSSWIND