From: Rabbi Moshe Sofer
To: Unknown recipient
A needle found in a slaughtered animal raised a doubt whether it had fully penetrated both sides of the intestinal wall during the animal's lifetime, potentially rendering it treifah. The Chasam Sofer ruled leniently by combining two grounds: the substantial weight of Rishonim (Rashba, Ran, Ra'ah, and in his reading, the Rambam) together with the Mechaber, who hold that large or raw pieces do not qualify as chatichah ha-re'uyah lehiskabeid and can therefore be nullified; and the factual doubt about the needle's penetration. Given the very great financial loss involved, these combined leniencies provided sufficient basis for a permissive ruling.
Source: Shu"t Chasam Sofer YD §91