Each of these is a refusal this regime lets a counterparty attempt, paired with the answer to it. Reading them before you write is worth more than any amount of polish on the letter itself.
It was a technical fault, so extraordinary
high likelihoodThe carrier calls an aircraft defect an extraordinary circumstance and refuses compensation.
What answers it
SHY-YOLCU was drafted on the EU261 model, and under that model a technical problem arising in the ordinary course of an airline's activity is not extraordinary — it is inherent in running an airline. Only a hidden manufacturing defect revealed by the manufacturer or a regulator, or damage from an act of sabotage or terrorism, has been accepted. Ask what the defect was and when it was discovered.
SHY-YOLCU, Olağanüstü haller (extraordinary circumstances) — Olağanüstü haller (extraordinary circumstances)
A voucher or miles instead of money
high likelihoodThe carrier offers a travel voucher or loyalty miles, typically presented as worth more than the cash.
What answers it
As under EU261, compensation is a money entitlement and a voucher requires your agreement. Vouchers expire, are blacked out at peak times and cannot be transferred; the cash cannot. Declining a voucher does not prejudice the claim.
SHY-YOLCU, Tazminat hakkı (right to compensation) — Tazminat hakkı (right to compensation)
Payment in lira at a rate that suits the airline
medium likelihoodThe regulation states the figures in euro. A carrier paying in Turkish lira converts at a rate of its choosing, often an internal rate materially below the market, and sometimes at the rate on the date of the flight rather than the date of payment.
What answers it
The entitlement is expressed in euro. If the carrier pays in lira, ask it to state the rate it used and the date it applied, and check both. Where the lira has moved between the flight and the payment, using the older rate transfers the currency loss to you. You are entitled to insist on euro.
SHY-YOLCU, Tazminat hakkı (right to compensation) — Tazminat hakkı (right to compensation)
This was a domestic flight, so nothing is due
medium likelihoodThe carrier suggests that the passenger-rights regulation is about international travel.
What answers it
SHY-YOLCU has an express domestic limb paying EUR 100, and its reach is defined by departure from an airport in Türkiye — which every domestic flight satisfies. The domestic figure is lower than any international band, not absent.
SHY-YOLCU, Tazminat hakkı (right to compensation) — Tazminat hakkı (right to compensation)